IMO Rule #1 for regional carriers is do not move for them. Equipment can change, pay can increase, and bases sure do change a lot now a days with all the contracts and planes changing hands. I took a gig where I live and really haven't regretted it. All in all, no one plans on being around the RJs long term, so I would recommend you don't either. Pick what best fits you currently and just go...because seniority does matter.