http://www.dell.com/us/p/alienware-M18x-r2/pd.aspx
http://www.sagernotebook.com/index.php?page=product_info&model_name=NP9170 (Note: It'll say GTX 675, but once you go to customize it, you'll have the 680 option)
Clevo 150EM (starts at $1320ish) or 170EM (starts at $1370ish). Thes eare sold unde rvarious "brand" names such as Sager, WidowPC, VoodooPC, Falcon Northwest, Eurocom ..... before Dell came along, they also made Alienware. Buying direct from Clevo / Sager distributor will save ya about 1/3 of the price.
The 675M is a $100 option over the 670M
The 680M is a $495 option over the 670M
Hey Jack, I have a question. Are there any places that sell Clevo's where you can build them yourself versus going through a reseller like Sager or XoticPC?