Hmmm.... My personal favorite, and the one I'm buying next year, that is The Lenovo Y500 or Y510p. It's got SLI as well! You can get it for 1100-1300 USD. Alienware is also there but is really expensive.
You can also try some laptops out there with the ATI 8850m graphics. Nvidia 640m Graphics work as well but aint as good as the others I mentioned. Nvidia 630m Below may not satisfy as much if you're a hardcore gamer, but for casual gamers it'll work well. I'm sorry I cant help much more in the ATI department as I'm an Nvidia Fan Boy

but there are some really good options in ATI out there as well, 8850m I believe is one heck of a deal right now though (Cheap laptops are coming out with it).