Stock PSU is always crap, get a different one.
You don't need the SLI version of the DFI Lanparty. Save yourself $70 and get the DFI Lanparty UT nF4 Ultra-D
. Its on a Labor Day special right now so you save an extra $12
That motherboard has a very good Integrated 7.1 Sound Card, save yourself $122 and ditch the Audigy.
Why're you buying the Athlon 64 4000+?! Its not worth it. Get the 3200+ if you're fine with 512KB L2 cache. Get the 3700+ is you want 1MB L2 Cache. You can overclock the 3700+ .2 Ghz (An overclocker can do that in their sleep) and make it a 4000+.
The 3200+ will overclock farther though,