I've got a 9600 I use as my primary System 7 dev machine, and I use the Radeon 7000 w/64MB of RAM to be able to use 1920x1600 DVI. Does your Radeon 9200 work from ROM? Or does it only work after the driver loads?

I'm also using the Sonnet SATA card with an SSD. It's a nice upgrade from SCSI IMO.