I have that exact same motherboard, and I frequently use my computer for music recording and some production (Ableton Live 5)
However, i'd reconsider everything in your build.
CPU = Intel really has the advantage with conroe.
Sound = That card is a joke for doing recording and production, get some real sound cards like RME, MoTU or M-Audio cards.
Hard drive = Fine if it's a 7200.10 series drive.
Motherboard = It's a great board, if you were buying this last year. Look for LGA-775 boards to fit your new core 2 duo