If you want raw power at that price, I suggest you purchase a desktop instead.
With gaming notebooks, you sacrifice battery life and mobility (which are what I consider the basis of notebooks in the first place)
+1 to that.
I'd firstly think long and hard about whether you really need to play games on the move, and if you do then how portable you need to be. If it's a case of gaming at home but needing to move around as well then two separate systems may actually work out at better value than what you're considering at the moment.
If you do need to move around and play games then is it from place to place or on the way? If it's the former some kind of portable mini-itx system might be worth looking at.