I'm looking at getting into PC gaming. I currently have my 15" rMBP and iPad Pro. I had seen the Alienware 17 R3 with the graphics amplifier and thought that'd be perfect for me. Can game on the go (relatively portable) and hook it up to an external monitor and graphics amplifier at home. I could also build a pc but since it's tethered to my desk I won't use it much at all. I just hate buying a laptop when I have 2 portable machines. How is the 17 R3 with a graphics amplifier with a card such as a 1080?