AMD has a list of recommended power supplies. Most of those have a large air intake at the bottom to help vent CPU Heat out the back of the power supply.
amd has a whole list of recommended p/s but any generic 300watt p/s should do with your settings. i've got 4 80mm fans, dvd-rom, cdrw, 2 hd's going at the same time with 300watt. it's no problem...it'a compusa brand, which is pretty much generic
If you can't beat 'em kill 'em
athlon "SLOTA" thunderbird 700@1050mhz
300w should be fine. But you might want to get a little higher if u plan on getting a dual athlon system. they are coming our relatively soon, march i think, and they are gunna be power hungry.