Well, a RM2k budget can get you a few 15" notebooks
15.6"
Dell
Inspiron 15, i5-3337U + AMD HD7670M@RM1749[2.25kg], 4GB, 750GB(5400rpm), 4-cell, Linux; W8SL@RM1899
Inspiron 15, i5-3337U + AMD HD7670M@RM1799[2.25kg], 4GB, 500GB(5400rpm), 6-cell, Linux; W8SL@RM1949
Inspiron 15R, i5-3210M + AMD HD7670M@RM1899[2.65kg], 4GB, 500GB(5400rpm), W7HP/W8

Toshiba
Satellite L850-1015X/XR/XW, i5-3210M + AMD HD7670M@RM1971, 4GB, 640GB, W8SL, 3 years local warranty; colors:black/red/white
Satellite L850-1024X/XR/XW, i5-3230M + AMD HD7670M@RM1899, 2GB, 500GB, W8SL, 2 years local warranty, RM50 shopping voucher; colors: black/red/white

AMD is not really up to Nvidia's level at the moment, focusing more on budget notebooks only. i5 is basically i3 with turboboost, they don't really make a very huge performance differences for normal usage 

Feeling like doing so too. but still have to get advice from you guys instead of my own opinion. I might be wrong sometimes too as I dont know much about laptops compared to you guys. 

macbook air: less powerful, more portable
macbook pro: more powerful, less portable

dont buy dell..

Haswell, haswell. Guys, Haswell is not in most of the laptop brands in Malaysia yet.
Want Haswell, be patient and wait till 3Q13, ok? 

Clock for clock, you may see 2-5% improvement in performance (depends on which benchmark you read).
Lower power consumption, if everything remain the same, may also leads to better thermal profile for the laptop.
As TJ like to say:
"Buy if you need it now. Wait if you can."

haswell isnt focus just only for battery life, even performance improvement. but it depends on personal preferences, as a processor never helps in heavy gaming.

yes, they will increase. assuming, an ivy bridge Y400 priced at RM2799, and Y410p at RM2899, it is a RM100 difference. since the release of haswell processors, every computer components had a price hike.

im working at a computer shop, so i know.

if you are urgent to get a haswell laptop, the one only you can get is this:

Acer V5-473PG-54204G50, i5-4200 + Nvidia GT740M +(1366x768;touch)@RM2299, 4GB, 500GB,W8 *no OD

but seems to be overpriced your budget, though.

For your usage pattern, CPU actually may not be the most prominent factor in terms of "performance".
When an user has lots of window open, not all windows opened are taking a large chunck of CPU processing time (CPU / software combo is pretty smart at figuring that out now).

You need lots of RAM. 8/16/32G, depends on your level of window-open and the number of RAM slots your laptop have (normally 2 slots, so you could probably put in 2x8G).

The 2nd factor of "lag" that user feels is HDD access. HDD is the slowest component in a laptop. Reading / writing files / data to / from HDD actually contribute the most "lag" feeling.
This is further compounded by the notorious windows swap file (so called virtual memory). If the RAM is insufficient (or sometime even when it is sufficient), OS will write some of data in RAM onto the HDD swap, and all this swapping to / from slow HDD make user feel even more "lag".

The solution?
a. Replace the HDD with SSD.
b. After a, (this is more extreme, only do it if you are absolutely sure that the laptop has sufficient RAM), go to control panel and turn off swap file.

Replace HDD with SSD - the difficulty / troublesome level actually depend on laptop model. Some model let user access HDD bay very easily. Some models require user to tackle 40+ screws, tear out almost the whole laptop

free RAM upgrade - that we actually has to thank laptop brands. Why they decide to stick 2G RAM into laptop as standard spec for certain models when W7 or W8 actually will not run optimally at least with 4G (if OS is 32bit, can't utilise more than 4G). So I think re-sellers just take pity on buyers (or save themselves the hassle of getting blame by the buyers later "why laptop so slow ah?" )
But remember, the RSP is just that. Re-sellers normally can give a bit of discount, and more RAM is a form of "discount / free gift"

Do ask them if they are giving you another 2G stick or replace the 2G stick with a 4G stick. Impact future upgradability since laptop normally only has 2 RAM slots.

can can, for example, try to squeeze out an additional 4G stick rather than 2G stick 

OH, I forgot to mentioned... keyboard area+screen plate aluminium... the chasis can be plastic.

I've seen them in person. The spec+price doesn't fit me, I can get better specs for Lenovo or Toshiba.

Dell Inspiron 15R, i7-3537U + AMD HD8730M@RM2499[2.32kg], 6GB, 1TB(5400rpm), 6-cell, W8SL

this is the only that worth the budget. spending extra RM700 for an anti-glare full HD reso isnt worth it.
the aluminium look makes it feels it is well made and doesnt cheap either. for the lenovo, i felt that the brushed aluminium looks like they easy to be cracked and the Yoga even worse, feels like the rubberized palm rest will easy to wear off. toshiba on the other hand, more worse. the whole body is plasticky feel, due to the traditional glossy design.

Is there any laptop with 4GB RAM,2GB Gpx Card, 1TB pricing around RM1500 maybe?
btw, thanks for the fast reply :3

no other disadvantages. battery consumption on the other hand, is not highly affected by screen size. due to the ULV CPU that is provided by intel, it can provide a better battery life.

I see, will try it out.

Thanks bro!

I don't mean to be hard on you, so pardon me if I sound that way, ok?

Buddy, you are not negotiating, you are "fishing"
When you go to the negotiation table (figuratively speaking), you must be clear on the position you want.
The other side will offer something to you (their position). Most of the time, it is good for the other party to reveal their cards first. In this case, Dell Sales are throwing freebies at you. But those freebies are not your PRIMARY objective.
What are your objectives?
You want extended warranty to 3 years (important), and larger battery (maybe can compromise), and price below your budget (very important).
So you must state that your position.
Tell them your budget is only RM1.5k. Tell them the e-value code (never go wrong with Dell) . If you extend warranty to 3 years, and opt for larger battery, what is the price you see on screen (probably exceed your budget by RM100++?). Tell them you don't want any of their freebies.
Do we have a deal?

Asking for "best deal" is not a good negotiation tactics. The other party has to GUESS what is "best" for you, and that leads to lots of frustration on both sides 

can can, for example, try to squeeze out an additional 4G stick rather than 2G stick