Rather than going an "audiophile" soundcard, I'd stick with using a proven dvs soundcard like SL3, SL2, SL4 or whatever what was originally designed to be used in the dvs system...
Basically anything should work and all you care about is the I/O latency - thats why I recommend using a pure dvs soundcard rather than experimenting with studio soundcards where the sound quality benefit will be hardly noticeable...
Saying that you are an audiophile and you are using dvs to play digital tracks - in one sentence?? :-D You can't polish a digital turd using an "audiophile" soundcard anyway... ;-)