Here is a review of the dreaded non supported Pheobus. As you can see the $40-$50 sound cards are just as good as the $200 Pheobus is. Plus the fact we have gotten two beta drivers in a little over a years time. And currently still waiting for WHQL drivers now. All you will get on driver information is, "They will be released soon." This is probably why they have a "F rating" at the Better Business Bureau now. Honestly I would get another brand all together at this point. Perhaps look at the Creative Labs line up. Here is a review of the Pheobus for you though.
I have the Razer Tiamats and had them connected to the Xonar DX and the Xonar Xense. I now have the Phoebus and can honestly tell you that I have had ZERO problems period. Best damn sound card I've evr owned. Believe me. I've owned almost EVERY higher end sound card with none of them providing a better analog surround for gaming.