I haven't looked into the current state of linux support of AMD and nvidia for a long while but it's that time again, I need a new graphics card.
Yes, the information is out there, waiting to be read but it's not always easy to tell outdated from current information. So, if anyone would be so nice to sum up the current state of things that would be really cool.

Some important points for me are the ability to use multiple monitors (preferably 3), h264 acceleration, stability, general gaming and compiz performance and wow support.