Never dealt with this company before but they have tons of options. You kind of have to dig for ones with USB3 but here are a few:
http://www.xoticpc.com/asus-n73jqa1-order-p-2832.htmlhttp://www.xoticpc.com/asus-n71jqa1-p-2733.htmlhttp://www.xoticpc.com/sager-np8850-built-clevo-w880cu-gaming-laptop-p-2798.htmlhttp://www.xoticpc.com/asus-nx90jqa1-order-p-2835.htmlThat last one has an 18.4 inch display but integrated GFX, 335m.
The sager one has GTX 480m, very nice!
I'm nearly drooling over these laptops. Good luck!