http://secure.newegg.com/WishL...WishListNumber=5098249
Is what I'm thinking about. I've already got 4gb of DDR2 800 memory lined up.
While I'd like to experiment with one of ATI's newer cards, I do play City of Heroes. For reasons out of my control, ATI cards just don't work optimally with it. If it weren't for City of Heroes support, a 4870 or waiting a few more weeks for the 4870X2 would be a no-brainer.
So I'm carefully considering a high quality MOBO that will run the nvidia card but will leave me room to crossfire two 4850s or 4870s in the future. Unfortunately I already have this PSU so I'd really really like to re-use it. Worst case: I'll get a new PSU if I pursue a crossfire setup.
I've got to admit that I'm wary about the whole crossfire/SLI concept just from historical problems. Current FPS games seem to do decently well with it but I love playing MMOs most of the time. City of Heroes is an old engine so I suppose it is no shock that it completely chokes on multi GPU setups. It's also an OpenGL based game so I think that's why ATI has such problems with it.
I'm in the Wrath of the Lich King beta for WoW and now that I can finally get character/NPC shadows it's starting to test my current 8800 GTS 320's capabilities. I'm assuming Diablo 3 and Starcraft 2 will be comparable engines to what's in WoW now. If anybody's got some empirical data on their performance in World of Warcraft with NVidia vs. ATI and single GPU vs. SLI, please chime in!