Diminishing returns kick in pretty hard on gaming laptops over $1500. For instance, going from the Nvidia 870M to the 880M generally costs ~$400 for a gain of ~10-20% FPS. If you search around, you will be able to find a good gaming laptop for $1500 or less. Nvidia's 870M, 780M, and 880M and AMD's M290X/8970M are the best available laptop GPUs right now. You can search for laptops with these GPUs on sites like Newegg or Amazon, or go to custom laptop sites like ibuypower.com and xoticpc.com that will give you a little more control over what goes into your system. Keep in mind custom laptops generally take a little longer for delivery than one from, say, Newegg.