I had moved this stuff to the wiki so everyone could edit/add to the list since there is only so much info allowed in each post. However, the wiki is undergoing some transformation and I don't know if it will be translated to the new wiki.
USB soundcards by nature use a good amount of CPU usage. USB DACs do not however because they are very simple. Perhaps that would work if you do not need line input.
Hey soundman, what do you think about this cheapo card?
P.S. your the one helping me with my dual amp setup in another post :)
Still need a card, just reading up