Thanks very much for your help, guys. Walter, that chart really helped me in my search to get the most bang for my buck. I ended up going with the GTX 480 which I bought from macvidcards on ebay. This guy does some declocking and whatnot to make sure the cards work properly with the Mac Pro. This card came with two DVI ports, so I had to get converters to connect my 27″ apple cinema display and 1080P TV. I’m on Lion, so I was instructed to only download the CUDA driver, which I did and is fully up to date. Everything is working great so far – except AE playback in CS5 and CS6! When ram previewing a scene, I get screen tearing. It’s not terrible, but is distracting. If I play the same rendered out clip in Quicktime, I don’t have this problem, so it must be AE not liking the card because I didn’t have these issues with the stock ATI card that came with the Mac Pro. And it occurs on both monitors – so I don’t think it could be the DVI converters. I’ve read around this and other forums and it seems many people are having screen tearing issues, but mostly with just CS6. If anyone reading this has any ideas I’m very open to hearing them.