You might want to look into the new Alienware m11x. It has slightly better processors. I have the original version with 4 gigs of ram, 1 gig of video memory, and two 1.3 GHz processors and it scores 1200-1300 on low resolution.
It cost $900 excluding the warranty. According to the beta system requirments, the only thing that doesn't meet them is the processors, which can be overclocked to 1.7ish
You -do- realize that <1500 is "Game will not run", so you just suggested buying a laptop that will definitively not run the game at all?
Unless you find the need to play games outside of your home or somewhere you feel you couldn't bring a desktop with you I'd suggest you spend 300-400 on a netbook for your mobile needs and 800-900 on a desktop (hopefully one you build yourself) for your games.
Laptops really don't play games well and only last about two years before new games become practically unplayable.
This. The highest benchmark scores I've seen on any laptop are only in the low 3000s on 720p, and those are $1800-2500 laptops. A $1200 laptop MIGHT be able to run the game on low. Maybe. Can't promise that.
A -good- gaming laptop is already really expensive, and you're trying to buy a system that is inherently not designed for gaming and get it to run a game which will likely outclass any other game on the market in terms of "Specs needed to run the game on anything reasonable to look at" for a good 2-3 years.
I would strongly advice getting a desktop, but if you must get a laptop, $1000-1200 might be able to buy you a system that will run the game on minimum settings. Possibly low, if you find one on sale.