Good for you, nice board, it'll last you.
You know, that's not a "P.S." kind of a statement. That's almost as important as the motherboard!
Anyway, let's kick off.
You want to overclock but have serious quiet.
You want an Antec P182 (although i'm not convinced about Scan's skins! LOL). Review 1 2 3. The only real downside is that it's not small, but i have the precursor (P180) and dont regret it for a second.
There are alot of good, and bad PSU's. You dont want to go too far over the top or you will ruin the efficiency, so i'm going to take a stab in the dark and say you want something 450W to 600W, probably the upper end of that. Be wary of anyone who says "gets a 900W or 1000W PSU just to be safe ...".
Bit-tech's reviews.
There are lots of good ones, but get this Corsair 550W and be happy