personally, sell that card and just get a GTX295 on that board... as you will more then likely be disappointed with what you plan to do. as for around the same cost you can get a SLI P55 board which is for socket LGA1156.
which SLI lga775 board, well that is a tuff one... alot of people like the FTW line but if your not ocing... i would say get a 750i board....