I used to have a Digidesign Audiomedia III then moved up to the Digi001 that I recently sold because I want to go Firewire.
I wanted to get rid of PCI based card that I think will be obsolete soon.
I am waiting for the new ESI-PRO soundcards
http://www.esi-pro.com/
Right now I am using the stereo INs/Outs of my G4