The latest S300 model comes with W8 already right?
It should be able to handle your requirements, but on the safe side, try to "test-drive" on display models, just to be sure

This one is the cheapest, and most decently-speced notebook capable of gaming for that price range
14"
Lenovo G480, i3-3110M + Nvidia GT635M@RM1499, 2GB, 500GB(5400rpm), FreeDOS

But do take note that it doesn't come with an OS

Yup, I've seen display units there the last time I went there

Well, they are display units (which are meant for you to abuse try)

Good or not depends on what you are using the notebook for?

These perhaps?
14"
Acer
V5-431-887B2G50, B887 + Intel HD@RM1299[2.1kg], 2GB, 500GB, W8

Asus
X401A-091/092/093R, B820 + Intel HD3000@RM1299[1.85kg], 2GB, 500GB, W8; colors: black/white/green; 1 year warranty

Dell
Inspiron 14, B820 + Intel HD@RM999[2.1kg], 2GB, 500GB(5400rpm), W8
Inspiron 14, B980 + Intel HD@RM1199[2.1kg], 2GB, 500GB(5400rpm), W8

All are capable of handling the tasks you've mentioned

Y580 is better by a A LOT if you are looking at gaming performance

You won't be able to get a Full SSD at that budget range, but you can get something with an mSATA
14"
DEll
[Ultrabook]Inspiron 14z, i5-3317U + AMD HD7570M + 32GB SSD + 500GB(5400rpm)@RM2449[1.87kg], 4GB, W8 *no VGA port, OD

The Dell is better in a sense that it has a faster HDD. CPU and GPU-wise, both perform similarly...
As for warranty, no doubt Dell is better. The Z480 is slightly more expensive. The money you save from buying Dell can be used to extend warranty to 3 years (~@RM250)
But I don't think you can get FreeDOS models though... we only have a handful of those, and most are very budgeted units

mSATA SSD will help in terms of overall speed, including boot and shutdown... but the speed increment will not be comparable to that of Full SSDs
You need at least RM3.2k to get a notebook with a stock, Full SSD from Dell
Unless if you don't mind upgrading to SSD yourself

Z480 is around RM2.2k right?

Well then, can consider this one:
14"
Dell Inspiron 14R, i5-3210M + Nvidia GT630M@RM1899[2.38kg], 4GB, 500GB(5400rpm), W7HP/W8

Use remaining money to extend warranty to 3 years, and perhaps a 140GB SSD

You'll probably need a higher spec notebook for Computer Engineering
But there are not much options for Asus at 14", perhaps you might want to consider 15.6" notebooks instead.
For 14":
Asus A45VS-VX028H, i7-3630QM + Nvidia GT640M@RM2899[2.4kg], 4GB, 750GB, W8

Yeah, can consider this one:
15.6"
Asus N56VZ-S4284H, i7-3630QM + Nvidia GT650M + (1920x1080) + Bluray@RM3699[2.7kg][B&O], 4GB, 1TB, W8; color: black

It packs quite a punch, and doesn't weight as heavy as a G55 (not recommended here since you are probably looking for something more portable). Comes with quad core i7 for insane multitasking, and a FullHD screen for larger workspace~
You can use the remianing money for extra accessories, and perhaps upgrade the RAM to 8GB

Hmm, hard to say
Whether it lasts or not depends on a little bit of luck, and most importantly how you take care fo the notebook
To me, an additional feature means an additional potentially faulty component
and Asus Malaysia's warranty support is not exactly very good though..

Y580 is your best best man
Try looking for it, don't settle down for something poorer in terms of gaming performance, sure will regret...
Perhaps you can try your luck in LYN Garage Sales?

LYN's Garage Sales is your best bet, unless if you don't mind trading in or selling as cheap 2nd hand units at physical stores in LYP

Well, you don't really need a lot of power for your needs, perhaps this one? (Assuming you want something with an OS)
14"
Dell Inspiron 14, i3-3110M + Intel HD4000@RM1399[2.1kg], 2GB, 500GB(5400rpm), W8

You will still have money to extend warranty to 3 years and also upgrade to SSD

We mostly recommend Dell because of its superb on-site warranty support, which is unmatched by all the other brands which require you to bring your own notebook to the service center should anything fail
It all depends on what you are looking for.

The Inspiron 14R SE comes with a 750GB(7200rpm) HDD whereas the Lenovo comes with a 1TB(5400rpm) HDD. Although the Lenovo has a larger harddisk space, the Dell has the faster rotating HDD, which means your overall computing experience will be faster
Some more you can always get an external HDD (up to 3TB now) if you feel 750GB is not enough for you

The Inspiron 14R SE comes with a 500GB(7200rpm) HDD: http://configure.ap.dell.com/dellstore/con...s=dhs&cs=mydhs1

Like what nexus and I have said, HDD speed is more important than capacity. If you need more space, just get an external HDD.
As to where to buy, just get from Dell online (remember to bargain)

For Photoshop, RAM > CPU > GPU in terms of performance gain
Try to look for the Lenovo Y580 (its getting rarer now, but if you can get one then it'll be great):
15.6"
Lenovo Ideapad Y580, i7-3630QM + Nvidia GTX660M + 1920x1080 @RM2999[JBL], 4GB, 500GB(5400rpm), W7HB/W8, backlit keyboard, 2 yrs warranty (Stock limited)
*upgrade RAM to 8GB

Otherwise, go for these:
15.6"
Dell
Inspiron 15R, i7-3517U + AMD HD8730M + (1920x1980; anti-glare)@RM3199[2.32kg], 8GB, 1TB(5400rpm), W8SL
Inspiron 15R (Special Edition), i7-3612QM + AMD HD7730M + (1920x1080; anti-glare) + 32GB SSD + 1TB HDD(5400rpm)@RM3199, 8GB,backlit keyboard optional, W7HP/W8

Price are in RRP, negotiable