Well, what put you off the Elite Pro? Because the Prelude is just an X-Fi at heart from what I know.
All I know is I'm happy to be rid of any Creative products, absolutely hated the driver problems and support issues.
Looks like its got interesting with the Xonar D2X EAX 5.0 update... however...
Xonar
It appears the EAX 5.0 Encoding is done via software which puts pressure on the CPU, HOWEVER, the DD LIVE encoding is done on hardware.
Prelude
EAX 5.0 encoding is done on hardware ALTHOUGH the DD Live encoding is done via software.
Which one is going to be more CPU intensive?
Also, is OpenAL on the Xonar hardware or software based?
thats just ridiculous :/