Where are you going oh?
Warranty support good here doesn't mean it will be good over there (if covered at all) 
15.6"
For that price range, usually hese are recommended:
Acer V7-582PG-74508G52k, i7-4500U + Nvidia GT750M + 24GB mSATA + 500GB HDD + (1920x1080 IPS; touch)@RM3399[2.2kg], 8GB, W8

Asus N550JV-CN077H, i7-4702MQ + Nvidia GT750M + (1920x1080; IPS matte) + Bluray@RM3699[2.7kg], 4GB, 1TB, W8, backlit keyboard

Dell
Inspiron 15R, i7-3537U + AMD HD8730M + (1920x1980; anti-glare)@RM3299[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, W8

Lenovo
Y510p, i7-4700MQ + Nvidia GT750M(GDDR5) + (1920x1080)@RM3099[2.7kg], 8GB, 1TB, W8, red backlit, swappable ODD, 120w psu, 2 yrs
Y510p, i7-4700MQ + Nvidia GT750M(GDDR5) + (1920x1080)@RM3999[2.7kg], 8GB, 1TB, W8, red backlit, GN37 exGPU & ODD, 120w+170w psu, 2 yrs

MSI
GE60-2OC, i7-4700MQ + Nvidia GT750M(GDDR5) + (1920x1080; anti-glare)@RM3599,8GB, 750GB(7200rpm), W8, steel series KB

GE60-2OE, i7-4700MQ + Nvidia GTX765M + (1920x1080; anti-glare)@RM4299,8GB, 750GB(7200rpm), W8, backlit keyboard
GE60-ONC, i5-3230M + Nvidia GTX675M + (1920x1080; anti-glare)@RM3299, 4GB, 750GB(7200rpm), W8

*Prices in RRP, negotiable
*Need to upgrade warranty to international for certain brands. Please do check whether they are covered in the country you are going to prior to purchase 

*Just Google them up, shouldn't be too hard 

The price is already in there what?
RM1499
The earlier pick is better though. Both the CPU and GPU are better

putochip123 seems to be giving a 8% promotion on Dell notebooks, might wanna try your luck there
https://www.facebook.com/pages/DellAlienwar...ster=ts&fref=ts

Yeah, Linux is an OS that you can grab for free haha
We don't support the use of pirated products. But if you really want to use it, you can just check with sellers, some might be willing to help you out 

The price is already in there what?
RM1499
The earlier pick is better though. Both the CPU and GPU are better

putochip123 seems to be giving a 8% promotion on Dell notebooks, might wanna try your luck there
https://www.facebook.com/pages/DellAlienwar...ster=ts&fref=ts

He is definitely a trusted seller
He is the one we always look for when our Dell or Alienware machines (even non-Dell notebooks) needs upgrading~
Very friendly and reliable guy, no worries~

IINM, both are just the same thing. just the fact the one with 1GB discrete base may be the VRAM.

no. you wont lose the Intel HD4000.

Gaming depends on the graphic card , not the processor.
And the AMD HD7670M is fully capable of handling Dota2, which is not very graphic demanding 

dota 2 is not cpu intensive game, so 1.8ghz is not a problem for it.

The price is already in the link you have provided? 
If you are looking for better price, Garage Sales is the place to ask, not here 
This is a recommendation thread

14"
Dell Inspiron 14R, i5-4200U + Nvidia GT740M@RM2049 [2.32kg], 4GB, 500GB(5400rpm), W8 , 6 cell

I've already provided you the link on GPU performance earlier right?
Please refer to that one, everything is in there 

1. Nvidia GT720M is better. Still, expect low gaming performance only

2. 1 year only

3. All are 1366x768