Any reason why it has to be a laptop? Honestly any gaming laptop (17'' montor and nice graphics card) will have VERY LITTLE portability. I'm using one now and it is worthless as a laptop. All i use it for now is a desktop that sits in my living room burning my lap all the time. You get less than 2 hours battery life IF YOU AREN'T gaming, and it weighs a ton.
I don't know your situation, just giving some advice that unless there is a reason why you must have a laptop, you would be MUCH better served gaming wise to get a desktop. As Mak said gaming will be much better on a desktop. Upgradability, heat, graphics... all things that are important in a gaming rig IMO.