If you make the transition, choose your program wisely.
I've looked at all of the RTP programs. There are differences. For example, an airline in WI bases their training on 24 sim sessions, while in STL the program is based on 8 sim sessions. Eight seems like it would be a challenging ATP/type rating for a helicopter guy. I think I would go with the longer program. Pay isn't that much different from one regional to another.