Kay..what laptop is good for gaming.?

Okay I'll be more specific..on what I want..a computer with 7 hour battery..at-least..has a good webcam/video recorder. and is really good for games like the sims 3 (which is probably the only game i'll play) and I do NOT want a cheap laptop. I have a $400 dollars laptop now and it sucks big time. maybe a $600-$700? no macbooks either..parent's can't afford that. But i don't want a cheap computer.. I want one that's gonna be worth $600-$700 bucks.