I must say, cover #5 is the one I'd look to pick up - mostly because the title text can take up a reasonable area on the top zone, where's with the dropped-V's you end up with a very large amount of 'empty space' between the lettering and the main character on the cover.
I'd try take what you've done with #5, highlight the main character a bit more to bring him out, drop-shadow the title text... and see what it looks like.
Don't you love it how we're forcing you to do all these crazy things
