What's the Best AGP 3D Card for Linux (and X)?

Duncan McQueen would like to query you all on this issue "What is a good AGP video card for Linux? I have seen much about the new Savage 3D card by S3 and it is definitely in my price range, but I haven't seen anyone's success with running X on it. Any suggestions?" There have been quite a few submissions like this one, but they have been mostly requests for X servers which support the latest AGP cards. So I figured I'd kill two birds with one stone.