The best laptop among these three (ASUS K53, HP G6, Samsung NP350)

Hi there,
I would like to buy a laptop and have found 3 laptops fitting my specs and budget.
Firstly, my preferences are:
i5(2nd or 3rd gen), 4GB ram, 1TB , 2GB graphics.
I use it for gaming (low or medium settings ok), photoshop, low level video editing, autocad.
These are models:
ASUS K53SM SX010D
HP Pavilion G6 2313
Samsung NP350V5C

Here is the comparision (iam an Indian. rs40000=$800)
www.flipkart.com/computers/compare?ids=COMDH93QMXNH7U2W...

I feel that HP has the best config of all but i heard it overheats and customer service is bad. Dont know about this model though, as this has ati processor rather than intel ..Can this be used with a cooling pad(temperatures in India can be high)?
The ASUS is trusted brand and also specs are good.
Which one is better?
Thanks in advance