Some of you may be aware of the Creative MP3+ external sound card (should I say adapter) I think there is a similar M-Audio device also. What I'm thinking is - in a htpc setup internal soundcards are open to inteference created from the m.board and other devices. Using an external sound card should in theory cut down on this. What about using a device like that above to pipe Dolby Digital/DTS via the SPDIF to my amp? Do you think it's worth doing or should I just get a conventional PCI sound card and use the SPDIF on there.