In my tests the 6600 gives much the same performance as the 9800. The 7800 and 4500 don't add much, although if you use Quartz Composer compositions then the more powerful graphics cards are going to help. I'd plump for 7800 myself. The 4500 takes up two slots and is a complete beast - you need third party DVI to VGA converters as you can't fit two apple ones on the back because of the stupid 3D video port.

v.3.31 looks pretty good and we've been unable to break it in the office, which is good news. It's been tested under 10.3.3 - 10.4.4.

We put release candidates up for public review because there will always be stuff we don't spot.

One of the other neat things is Richard has put some extra tweaking for matching frame speed with sync frequency. Very useful. Catalyst also times the sync frequency itself rather than relying on feedback from the monitor back to the OS, which is usually incorrect..

Hugh