That's good - my choice shows I'm learning . Would you recommend one type in particular - I'm maybe leaning towards the Corsair as that seems to be one of the most popular brands. Given what i need it for, would a 600w unit be way too much?All the brands you've listed are reputable. I personally have used XFX, EVGA, and more so Corsair, and all are rock solid.
It depends on how much the bids end up. You can get good deals on brand new items for an affordable amount, but if your a staunch 'ebayer' you'll need to keep your eye on the ball since some of those bids look a bit higher than what I'd pay for a used PSU.
Also and maybe a "piece of string" question, regards the psu's I'm looking at, what sort of prices should I be thinking about?