just get the Ultra-D board if you're not going SLI. you can also mode them to an SLI-D or SLI-DR
get the LG 4163B drive instead, it is really fast, actually does get to its rated speeds, and is quiet.
go down to an Audigy 2 Value. you really won't notice any sound difference (unless you are superhuman)
although if you really want the ZS, you can actually softmod the Value.
download these drivers
(ISO, 549MB!!) or these
(EXE, 263MB!) and this compatibility patch
are some instructions on how to install them (the second is translated from Italian by Google)
and I'd suggest an X2 4400+ Toledo, or at least a 3800+ Manchester.