PSU looks fine, and the memory you can't go wrong there. Corsair and Kingston are the most popular for RAM. As for the heatsink, you can get the AMD64 CPU's with a specially designed AMD heatsink. I got the 3500+ with 3 yr gaurantee and AMD Heatsink and I have never had a crash, or overheating problem so far. The previous AMD I had, the 2800+ did however overheat alot and it just had a normal Heatsink.