Get the Asus K53SM-SX010D for 40k. For this price range, nothing can beat Asus for its specs. A Dell Inspiron 15R is available too, but Asus is clearly the winner of both.
Check their comparision here: Dell Inspiron 15R 2nd Gen Ci5/ 4GB/ 500GB/1GB Graphics/ DOS Laptop vs Asus K53SM-SX010D / 2nd Gen Ci5/4 GB/750 GB/2GB graphics DOS: Compare Computers: Flipkart.com
The Asus model is better in all sense.
* Both have same CPU and amount of RAM
* Asus has 750GB HDD compared to DELL's 500GB
* Asus has GT-630M graphics where as DELL has GT-525M graphics
* And Asus Laptops also have very good service and AFAIK they run very cool unlike HP and Acer.
Asus' hardware configuration wise is better among all but it doesn't come with windows 7.. for a genuine one he has to spend 6k more.
In hp he will get 1 year damage protection which makes the laptop insured from any kind of damage.
And hp's 2GB Radeon 7670M graphic card has better performance than nvidia GT 525M and GT 630M of dell and asus respectively.