"I won't have any problems with 330 with a P4 1.6a ocd to 2.4, 768 megs of ram, all the usual stuff, two HDDs, 3 cd drives.... will I?"
None at all. I have a slightly OC'd XP 2000+, Radeon 8500, 4 hard drives and other assorted hardware running of a standard Antec 300W PS. People on this board have become infactuated with wattage ratings of PS's thinking you need 500W just to run a standard midrange PC. It's completely false, a quality 300W PS is more than enough for any single CPU system someone can put together today. I don't care if you have 8 hard drives in the thing.