This is pretty much how it is. You can also go Alienware, but be VERY WARNED you will be paying MORE for what you get, easily.
What I use:
http://www.xoticpc.com/sager-np7280-...wconfigure=yes
Mine has a 980X and Dual 480M GPUs, the 990X and 5xx series weren't out when I got mine. It struggles playing the game at what I consider acceptable settings on my 30" monitor while my desktop is out of commission, but at it's native screen res or even 1920x1200 it runs as well as can be expected.
I also don't need the extra power adapter, except for a few rare circumstances. Running FFXIV on my 30" at 2560x1600 with the laptop display still turned on causes the adapter to trip. If I turn the internal display off it doesn't, but it doesn't perform as well as i'd like at that resolution. Wish I could get a job and paycheck soon so I can pay the extra power usage of my desktop and use that.