I just want to tell you as someone who bought a laptop with gaming in mind that it's not worth it. I got a top of the line (at the time) Alienware Area 51m laptop a few years ago, and it became outdated LIKE THAT. It's also not as easy to upgrade these things, so they can't keep up with desktops. I love this PC and it works great as a desktop replacement, but it's big, bulky, and has laughable battery life. The next laptop I get is going to be something made more with portablity in mind; I found myself rarely ever playing PC games and just sticking to consoles anyway. I think I'm going to get a Macbook Pro; I prefer Mac laptops to PC laptops based on my experiences with them.
Oh, and Alienware screwed everyone that bought this model over-- They said you could upgrade the video card, and then ended up switching their production to new models and dropping all support for this one. :/