Personally I wouldn't move for a regional carrier if you didn't have to. If you enjoy RDU, then I would go to TSA. If it's not a big deal, I'm not sure which one I would go with. I would probably wait until bankruptcy was over to see how things shake out at RAH. As someone said previously, I wouldn't worry about the 145s since they can and probably will fold 2 or all 3 of the carriers together eventually.