I'd say, best of the best. alienware 18, 4700-4800-4900-4930 i7, sli gtx 860m-870m-880m. 16-32gb ram, ssd/hhd galore (starting $2200-4500)
Otherwise, Asus JZ 4700, 880m, and either 256 (128x2 in raid) or 512gb (256x2 in raid), 24 or 32gb ram), either $2300 or 2800 depending which harddrive/ram one you go with.
I have the JS model, with 4700 and 870m, came with 16gb ram and 256gb ssd with 1tb 7200rpm hhd. That was $1800