I'd be leery about giving up PIC 121 time for an RJ FO gig since in my opinion, 1000 TPIC is about the minimum needed to make you competitive. If your going to make the jump, I'd target companies like Allegiant, Virgin, etc as well as the legacies. You'd get the experience you're looking for and it most likely won't be viewed as a lateral move. Easier said than done, I know.