Envy 14 will fill your needs if you don't mind the extra inch. Currently has a coupon $400 off if config'd over $1200 or maybe $1250.
http://www.techbargains.com/news_displayItem.cfm/229514
They have the following build for $850: HP Envy 14 Intel Core i5-460M 2.53GHz 14.5in Laptop...
Can anyone confirm or deny that running Crossfire will disable USB 3.0? Couple threads on tomshardware are claiming that xfire will disable usb 3.0 and sata 3.
http://www.tomshardware.com/forum/276794-30-x58a-ud3r-sata-xfire