Well, FWIW, Brooke Burke said in an interview that she thinks JD will win it. Here's a snippet. Sorry, not sure if I can post the link as the site it is on has fan forums.
REX: And.. Finally… Who’s gonna win the gig?
Brooke:* I’d say J.D.
REX:* Why Mr. Fortune?
Brooke:* He’s got thang. He’s sexy and he fits the band.* I don’t know if Marty needs the band to continue on his path… And, Mig is already a star.* But, I wouldn’t be surprised if Mig slips in there.