Urgent Help for buying a laptop!

Hello everyone!
Screen size -approx 15"
Needed for - Basic coding and student needs
HDD- 500GB + , bigger the better.
Price range <=40k
No brand specification

Please suggest a good laptop with long battery life!
Urgent i have to buy tomorrow.

Till now i have shortlisted -
Dell inspiron 15r V540414IN8 - i3, 1TB, 1GB AMD graphic card - 40.5k
VAIO E Series 15 Model:VPCEH3AEN/B - 38k
HP Pavilion G6-2103TU Laptop - i5, intel 4000 - 40k

Open to new suggestions! please HELP asap!