I'm not a gamer by any means. But I play Black Ops on my Dell xps l502x with the nvidia graphics option added on every now and then. It runs well on high settings.
I don't think they're that expensive for what you get. The JBL audio on it is INCREDIBLE. I'm almost certain there is no other laptop that has better audio than it. BEATS audio laptops are a joke compared to the JBL audio on the xps.
HOWEVER, i'm sure there are MUCH better laptops specifically for games and some gamers on here might have a better option for you.