I wouldn't want it to sound like I'm trashing Cadet programs. I never used one so I couldn't tell you the first thing about it. What I can tell however is that throughout the history of the regional airlines the "best" regional to work for changes with the seasons.
Overall, I'm happy at PSA. I kind of took a chance when I was hired. The company people that talked at my Indoc seemed sincere and wanted to make good changes. It got a little dark for a while and new communicative Union leadership along with some substantial changes made the whole thing worthwhile.
Could that change ? Probably, but I hope not.
All that said, I wouldn't lock myself into anything personally in regards to a Cadet deal.
You sound like you have a decent plan. Make a few more decent plans. When the time comes make the best decision for you is and don't look back.