Unless you absolutely need the portability of a laptop don't get it. At $1200 you can build a high end desktop that runs all games on ultra settings at 60fps.
My job currently (and for the foreseeable future) will require a fair amount of travel now. I'd like to game during my travels. I have a decent enough system at home I use but I don't have a laptop at this time.
I'd like the laptop to travel with and then when home hook up my keyboard, monitor and mouse.