Kris,
Welcome back!
The most important things with gaming laptops is the video and processor. Ensure that your machine will have at least an i7. (Never go less), and discrete video. Avoid those CAD/CAM precision workstations or the equivalent. CAD-based video is not good for games due to the way it works.
So having said that, Dell makes some decent gaming machines. Both of these lines are in their-high end so you will pay for the quality. For the top-end look at Alienware. I have a slightly older M17x which is a decent i7 based machine with a ATI 59xx series video card. The newer machines of the same line have an NVidia card in them now. These are discrete video, and not just a chip on the motherboard. Dell's other gaming line, with similar video options is a big less expensive, but will run pretty well. These too have the discrete video option.
Neither of these machines are cheap, and you'll get what you pay for. Keep in mind the cooling and the weight as well. The large-display Alienware which I have weighs a ton, and it gets pretty warm. The whole case is aluminum and acts as a heat sink. I put one of those coolers underneath the machine to keep it cool while running.
John