If you go to RAH can you transfer to other equipment/certificates?
I would go for the regional where if bad stuff hits the fan, you can see yourself spending some time at in regards to domiciles, pay and benefits. The quick upgrades can disappear overnight and majors freeze hiring.
It's all about being patient once you are in, right now you are faced with lots of tuff competition as there are highly qualified pilots with lots of experience who can't even get a response back from the big guys. Get in, build your time and good luck. But most importantly, don't forget to ENJOY your life! Too many pilots have forgotten that art..