I don't know about the revo, but I have the audigy ex and an audiophile 2496. With either a Via or Intel chipset I have had the same problem with the 2496, audio dropouts (using digital out), using the newest drivers and following people here on this forum. Never had a problem with the audigy (using digital out only).
I now would like to upgrade to either the audigy 2 (so I can have both analog and digital out for WMP9, DVD, and DVD-Audio), or the revo, (to do the same things but I have heard the revo does not have the software ready for DVD-Audio. Who on this forum has actually tried both cards for at least 2 weeks in the same system? Please tell me what you think (not just sound quality, but also capability for the above apps and troubleshooting, if any)