And with the year it takes to get your package together and get assigned a training date, two years of training to get your wings and your ten year commitment, you will be ready to come to the majors about the same time the planes start flying themselves!!! Of course now you are more than half way to 20yrs so why not stick around a few more years and get that retirement. LOL
For a guy in your situation, who already has some time and wants to be an airline guy, I'd go with the place that you can get the most turbine pic the fastest. Seems to me like a lot of the regionals are hiring guys straight into the left seat and that you would have enough flight time to do that. You have enough time to go to almost any regional you want and worst case scenario, you could pick one with a short upgrade time.
There are some sweet corporate gigs out there but don't think you will get as much time as in the airlines. Also make sure that you talk to some corporate guys first, I did a short stint in a King Air years ago and the flying was fun although mainly short trips with lots of waiting. Just wasn't for me in the long run. You're almost there man. Good luck with the job hunt!