Uhm, I saw one of your posts in the SCII zone. There you mentioned Castle Wars maps... I haven't heard about them... can you please tell me a bit about them ?
You should look for a couple of things when buying a PSU. Most of them out there today have these things so it doesn't matter anyway.
80+ is one of those things. It means it has over 80% of efficiency, or something like that.
Another neat thing is modular, meaning you can attach/detach certain cables, if you don't need them.