well the fsp and rosewill both only have 1 sata power connectors, so the seasonic will have to do, although according to 1 reviewer it said that it meant his dvd-rom was not powered. im curious to see how your current power supply powers your current system, like what cables it comes with.
From what I can gather, the guy requires 4 and thought it came with 4 because of the picture and realized it only came with two.
Hm.... hard to say.
Oh, and also, is there and specific manufacturers I should look for/avoid? I know a couple of good ones but not too much about bad. For example, sapphire? good/bad?