The first question you need to ask yourself - do you really need a laptop in the first place? Could you get away with a desktop if you shuffled about a few bits and maximised the space?
The concept of a proper gaming laptop is just a complete paradox. A gaming PC needs shitloads of power to feed the CPU, GPU(s) and of course, memory. Big power requirements either translate to a large, heavy battery pack and a power supply the size of a house brick. Or both.
Then, no gamer wants a mere 13.3" screen, do they? So you're looking at 17"+. Soon the whole 'mobility' concept becomes a little bit daft and you're lumbered with a heavy and expensive laptop that would get trounced by a PC that was a third, if not half as expensive.
The last proper showing of a gaming laptop I had was a £1,300+ Toshiba running COD4. It did look good, but no different that a PC running a £200 graphics card onboard.
The final nail in the coffin is their expandability - or rather, lack of. Decent gaming laptops can have a bit more memory, maybe even swap out the GPU. But I could rip out the mobo of my desktop, complete with CPU and memory and swap it out for an i7 solution for much less than a very good gaming laptop. All the while, retaining my power supply, case, keyboard and mouse.
Gaming laptops generally age. Very quickly. If you still want one, then it's both your choice and your money. But a desktop does it better, smarter, quicker and cheaper.
D.