What do you mean 3D? As in the ones with glasses?
If so you don't really need a powerful card to watch 3D movies.
The thing is that if you want it to work with a nVidia card you need special stuff.
For an AMD/ATi card you can you use any 3D capable monitor but they are hard to come by in North America.
Yes I mean with the 3D TV and the 3D glasses via HDMI 1.4a However I wold love to keep my gaming options open as well. So which ever is better at watching 3D movies (508 or 6970) would be perfect for me as I get more into gaming. So right now I'm only interreted in a sigle card. Duel cards are well in sight as well.
My rig is now being built. This is what I have so far.
What monitor/TV are you using for this?
I think you should just go for the GTX 570.. NOT the 580.
The 570 will be enough and will save you boatloads of cash...
I recommended the nVidia card because their 3D setup is pretty easy at the moment.. http://www.newegg.com/Product/Product.aspx?Item=N82E168...