I'm looking for a new PSU. I would love a PCP&C, but can't afford one. I have been looking at the Antec 550 line, because of their reputation for quality, and their relatively low price (around $100). The problem is, there are like 5 different versions. I can easily see the difference between the regular and the adjustable ones, but what about the others? Would I be better off with a dual 12v or the single? One single has 30 amps, and one has 36, but I can't figure out if there are other differences. Anyone know. Antec's site doesn't really clear it up for me, either.