Missing is the spec's mentioned is that the Audigy2 has a Signal to Noise ratio of 106, which is higher than the output of most CD players. So there is very little difference between them spec-wise.
I mention this because when you are trying to differenciate between signals that clean (both are excellent), it almost becomes a mute point. My advice is to see if you demo both of them on the set of speakers you plan to buy (difficult, I know).
Here is the reason: My brother and my own car audio systems are almost identical. Both have Alpine component speakers (and subwoofer) and Alpine amplifiers. The only difference is the head units. I paid about $300 for my Clarion Pro-audio CD deck, and he has an Eclipse.
Spec-wise, his deck should blow mine away, but thats not the case. The DAC's on the Clarion are warmer, even though the Signal-to-Noise is higher on the Eclipse deck. He spent $450 on his head unit. The difference is clear once you sit in the cars and play identical CD's for reference (my personal favorite CD to reference with is Juno Reactor's "Bible of Dreams"). :-D
So what I'm saying is simply to listen to both, if you can.
