If you need good audio for music/recording... get something not made by Creative Labs, although the Audigy 4 might not be such a terrible option from what I read about it.
Well, no, Creative Labs has a nasty habit of fucking with your audio despite effort put in other areas. More specifically, forcibly resampling everything to 48kHz internally(they MIGHT have made this optional in the audigy 4 hence what I said earlier). So really, if you need to do any remotely serious audio work, then you're better off staying away.
But it really depends if you want to hook up a surround setup, what exactly you're going to use the card for, etc. But for the best bang for the buck, I recommend the AV-710.