Fun with Book Covers Part 2

So with my next novel possibly nearing completion (depending on how much there is to fix), I've been experimenting with some book cover designs and I'd love to get some opinions on them. If you were purusing books, which cover would catch your attention? These are far from done, of course, I just need to know what works and what doesn't.

ETA: And please feel more than free to offer up critiques and advice. I need to make the best cover I can (without spending money I don't have).
( Poll under the cut... )