I've also had CSMKII's (and CSPPCs) and sure, they were nice. They don't make the machine all that much more capable than the 3640, though, unless you're running '060 demos and games. I'm not a day to day user by any means, so I'm more than happy to go with the 3640 ($100 card) and sacrifice the snappiness the $400+ cards afforded.