If you aren't planing on buying right away, and you already know what to choose, shouldn't this have been a discussion instead of "best answer" thread? Just sayin.
8350 is comparable to i5 performance wise I've heard, not power usage wise. You seem to know that already though.
Piledriver is not Bulldozer etc, it's Sandy Bridge to Westmere. But you know that too probably.. P: