The Prelude x-fi card is made for stereo sound as well as surround sound, as it has replaceable opamps for just the right and left channels. As a DAC, i think it is capable one and is better than the DAC on any mainstream soundcard next to a Sonar Essence and is supposedly better than the PCM1796 burr brown DAC found on my Onkyo 805. I use the soundcard in stereo mode when listening to music through headphones and using the 7.1 mainly for gaming.
I figure that an ampflier would make the most noticeable difference, so I'm going spend my money towards that first to see how it goes; that way I don't have to compromise with dac/amp combo. If I like the difference and become a believer, then i will be more inclined to spend money on a DAC to compliment it.
When i get my A/B switch, i will compare my Onkyo 805 DAC to my Prelude X-fi DAC, and then when i get the amp, I will compare it against my Onkyo 805, Pros vs Joes style 
Quote:
Originally Posted by
Equus 
You're welcome. For music and audio purposes, you might also want to think about trying out a DAC to see if that makes any difference. Some people swear by 2-channel stereo for their music, and a lot of HT receivers and sound cards used in the mass market today may not be optimized for that, since surround sound and effects is usually what they cater toward. Granted, this is a little farther down the road of things, but just saying.
Have fun on the experiment. Let us know what you hear. 