I have looked at Ameriflight and would go to them rather quickly, however, even with my CFII, I've heard that they stoped hiring FO's recently from the street due to them currently having sim issues during training. Rumor is most of their FO's now come from the UPS cadet program. I sent an email a few weeks back to what I believe was the pilot hiring email for them, but never got a response. Their website also appears to only have positions for captains at the moment. If I'm misinformed please let me know!