is there any good review website for laptops in gaming ability?

Q. like what kind of games each laptop can handle how well, etc.... thanks.

A. Personally I like newegg.com.
Though it is an online computer electronics store, many people have reviews on the various products they have, including gaming laptops. It's organized, and should be pretty straightforward to get what you need.

Where can I find the review for HP Laptop - DV7-1003ea? How good is this laptop?

Q. I m planning to buy a HP laptop (HP Pavilion dv7-1003ea). What is the best price available in the market at present?

A. newegg.com
tigerdirect.com

check there

Is there a site that has reviews for affordable laptops?

Q. Seems hard to find reviews for cheaper notebooks.

A. Try http://www.mycheaptech.net/

Check reviews or blog section.