"Gaming laptop" is an oxymoron, no matter how much marketing divisions try to convince you otherwise. This comes due to natural problems such as heat dissipation during high CPU/GPU load, as well as problems with battery life (unless you are willing to connect to a power outlet or else restrict your gaming sessions to 20-30 minutes between recharges).
That said, if you want a laptop that you can play games on, there is no need to spend an inordinate amount of money. Get a moderately specced one, which will probably not be able to run Metro Last Light or BF4 on max settings, but will do pretty good otherwise. I don't see why you would need anything more powerful and pricey.