I'm thinking about building a 64 bit system and I'm trying to find a good power supply for it. What have you guys had good luck with? I've heard that Antec is good. What else do you recommend? I'm thinking I'll need at least 300 watts, but would like 400+ watts to be on the safe side.

The specs of the system:
3200+ Athlon 64
Asus K8V mb (as of right now)
512 Gb pc3200 ram(crucial, corsair, viking)
160 GB WD 7200 HD
Other specs yet to be determined