Thanks in advance!
 
I have a new motherboard/cpu/ram arriving tomorrow, below are the components:
 
Asus Maximus Formula: Intel X38 DDR2
2X1GB G. Skill DDR2-800
Core 2 Duo E8400
 
My question is the following, should I use my existing Audigy 2 ZS, or migrate to the ADI 1988B 8-channel High Definition Audio CODEC. If it helps I am a gamer, and also I my pc plays all my music, in MP3 format.  
 
My operating system is Vista Home Premium 32-bit edition. Once again thanks for the advice!

I think this depends on your speakers. Try the on-board sound and see if it is all you need and decide from there.
 
Generally speaking:
If you are using some cheap speakers the on-board sound card should be sufficient.
If you have a sweet set of speakers use the add-in Card for better quality.

Thanks for the input! I did not know if the sound that came with the board which happens to be on a pci express x1 card would be better. However, it is the soundmax sound card so...
 
As far as speakes go i have some logitech 5.1's I forget the model name and it's not on the front of the woofers, but they are sweet speakers. So based on your advice I think I'll stick with the add-in card, the Audigy 2 ZS, once again thanks!

The Audigy's EAX4 will completely destroy the SupremeFX's EAX2 in games. There will be sounds and effects that you WONT EVER HEAR in the SupremeFX.

Thanks for the info Torch, I didint take that into consideration. That is very important, thanks!