Why not just buy my Alienware M18X laptop? I'm selling it for $2000. I know it's over your budget, but it's an absolute steal of a deal. It's only 8 months old and is equipped with a Intel Core i7 2760QM CPU (2nd gen Sandybridge quad-core CPU w/hyper threadng), two GTX580Ms (GTX580M = GTX675M), 8GB of 1600Mhz DDR3, Blu Ray reader, 18.4" 1920 x 1080P LED screen, 2 x USB 3.0, 2 x USB 2.0, 2 x HDMI 1.4a (1 x input, 1 x output), and one 1.2 Displayport (capable of 120Hz video output). This system would cost you ~$3000 to build an identical system through the Dell.com website.
If you're interested, just reply to my Craiglist posting and we can coordinate thereafter via email: