Best Audio Card For Dts?

What is the best audio card to play back the new encodings on the DVDs? 5-1 speaker set up spdif input

Another Tec. Post mentioned the Auzentech xplosion 7.1. I believe it uses the Via Envy c Media 8788 chip set. It looks pretty good. Anybody had any experiances with it or this chipset?
Thanks as always