I've had a CardDeluxe for a couple years now. Excellent sounding card. The only kicker is that while the card worked great with no fuss whatsoever on a Win98SE system it's pretty much dead when I did a complete overhaul and went up to Win XP Pro. The system indicates everything is working fine until you try to uninstall the driver or disable the device. Then device manager locks up. It also interfere's with some software installs.
DAL's support has been rather useless, "Sounds like a corrupted driver, just reload it." Duh! When I responded with details and indicated that this did not work I got only "Wait for the new driver". They do have a new WDM driver coming but it was supposed to be out about a month ago. I'm tempted to try and sign up for their beta test program just to see if I can get the blasted thing running.
I also have a Revo in a different machine but they aren't located such that I can compare. It is decent sounding but I can't say that it would match the DAL card. M-Audio's drivers are less then stellar also.
I don't know what all you want to do but remember the CardDeluxe isn't a multi-channel out card. It gives 2 ch analog in and out and SPDIF digital in and out. At least the drivers in the old set-up did a fine AC-3 pass through. If you're looking for multi-channel analog for games and AC-3 out for DVD playback the DAL may not be the best choice. If you want stereo playback or recording you'll probably like it or at least if they ever get the driver working.