For the year or so I used the Audigy 2NX as my sound card, I didn't use the included software, and I actually thought the sound quality was quite good. It depends a lot what you're running it into as well though.
My 2nx works great, but the my Tweets are crazy loud and i hardly heard the singing part of it... The EQ in the sound card is just BS... Just to get bass you have to turn on CCMS or whatever and then click on surround sound... well that makes that music echo... I have very powerfully system, so i hear it and i hate it.. When i had audio running thru the deck it was perfect..