Go interview immediately and get out of there. If there is no future, don't stick around because it 'will look bad'. I did exactly that a year and a half ago and couldn't be happier. Yes I'll have to explain it to mainline interviewers some day but it'll be pretty easy seeing where my old company is headed these days. And from the outside it looks like xjt is headed toward the same path. Move on now, a month of waiting costs you 50-60 pilots that are now senior to you. Worry about explaining in a couple years.

As to where to go? Seems like you are on the right track, except probably not rah, but do what is best for you. We'd love to see you over here at 9e. Good luck with your decision, I know it wasn't an easy one for me, but it sure felt good once I made the jump. Just don't wait too long.