I'm building a P55 i5-750 system. I'm planning on using my existing 8800 GT, since I don't have money for a nice newer card. I've noticed some 8800 GTs selling on ebay for $100 or less. Would it be worth while to pick one of these up and run in SLI mode? Or would it be better to just save my money for something later down the road. I'm coming from a AMD Opetron (2.52GHz) based computer. Crysis was decent playing with the 8800GT, but it would be nice to increase the resolution/fps a little. Plus I plan on playing a lot of Mass Effect 2 in the coming weeks.