Seriously, it's difficult for me to even choose one in particular because I find them all incredibly beautiful and kickass. Coverart C will probably be the best bet in willing, because it matches with the soundtrack covers and would be going along with the theme, however I really like Coverart A because it looks really professional-like with the standing-group shot and Admiral Cain/Kendra Shaw...but I also like Coverart B too, just for the matter of group shots. This makes choosing even harder because I do like all three. Couldn't they just have this bidding thing where fans could purchase whichever cover they wanted for a limited time or something? Gah! I honestly don't know.
And while I'm pining over which to choose, may I direct everyone to this brilliant "We Were Centurions" short-film. Oh my God, I now want my own little animated Centurion with their cute little voices, complaining about being second-class Cylons! So cute.