Swapping cap and opamp 
XTREME will do it for you, well, if you don't like risking your new XFi then forget about it, after months of usage maybe you can consider it, it's a worthwhile effort you're not going to believe. 

If you don't mind the budget, you can get the more expensive one, the DAC is better i guess... 

Finaly home at last to do some mods

Some componetes I change is LME49720 opamp, Nichicon MUSE caps for opamp supply and Sanyo OS-CON on digital part of the card. The only thing lacking is I only have 2 Rubycon Blackgate NX HQ 47uF for coupling, but I do change the non inverting signal that go to the opamp, I can just short the caps but I afraid of DC offset

I spend 1 week reading datsheets and look at the card, looks like there are one caps that Creative put the wrong values on it, and it's on Vref of the DAC. They cut corners I guess

Initial impression, the vocal is still stands out but the background detail improves, the high isn't piercing on the ear thankfuly. But its more picky this time, mp3 sounds awfully flat as it reveals all its flaws. It was tonally accurate, I guess thats why people say its analytical and a bit dry I might add. I will took some time for me to adjust for this sound

EDIT: So much typo, I guess I'm too excited

Picture time!

The LME has been used before, with all other caps. I have my own technique removing SOIC without damaging them, most people just cut them out but I keep all of them just in case I needed them back, no matter how bad they were. I never really believe in burn-in in solid state devices

EDIT: I have bypass the coupling caps after the DAC just by using solder while the caps still there just for testing, it seems that it have no ill effect unlike I got from XtremeMusic

EDIT2: I properly short the coupling caps, removed them and just use a wire to connect them, and I removed the big orange tantalum 33uF caps because I afraid it might blow up if it fails. I truly love how it sounds now, its more revealing and detailed than before!

No, I expected a huge DC offset too (maybe on 1 or 2V) but no, there is mere 100-200mV on each channel, not too much. I plugged in old Philips SBC HP200 headphone, it sings very well, and lasted me half an hour, I never put headphone that long before

What are the value of those 4 caps? The Audigy are hard to trace, you need to know what you are replacing. The 5216 is front channel obviously, the 4558 is for surround, and its for microphone in too

Its my PC, its my choice to mod or not. I'm here to support Creative user and not bashing people. You can continue this useless POS, and you can continue bashing Creative with their lack of EAX and OpenAL is dead. This is YOUR thread to begin with

You could try LM4562, LME49720 or LME49723. All of them are nearli identical, on paper at least, the 49723 have slightly worse spec. What I liked the most is LME49720, 2nd is 49723 and lastly 4562 (this is vary)

But for SB046X (XtremeMusic, Fatal1ty, XtremeGamer Fatal1ty) only supplies 5V to the opamp, its not enough to unleash its full power. Recomended voltage is 15V from one guy statement, I tested 5V and 12V and the latter indeed have better and smoother sound (you can ignore if you dont understand this, it'll work anyway )