Yuran, Yuran, Yuran,
First off the BEST Regional is the one that hires you All the reasons you state are valid but it really comes down to what’s most important to YOU. If it’s money then it’s money, location whatever. No one can tell you what’s best for you (although many will try).
Another thing to keep in mind is the best Regional (if there is such a thing?) right now might not be in 2 years. Many things can change including what’s important to you. When I was hired at ExpressJet they were the best Regional in the country at the time. Business was booming. We were the highest paid with the best contract. A few years later they were furloughing, downgrading and closing bases due to some poor business decisions. Right now everyone wants the new iPhone 7 but I doubt if that’ll be the case 2 years from now.
That all said wle it’s good to have a plan and an idea frankly you’re at Step 1 and you’re thinking about Step 167. Not saying I’m right but I first started training I didn’t even know what a Regional was. What I did know was I wanted to fly airplanes for a living and I focused on that. As I got more involved in the business (ie, started flight instructing) I spoke to other instructors and met their friends who were former instructors. They told me the good and the bad and eventually I came up with a list of favorites. ExpressJet was my first choice and I was fortunate that they hired me but if they hadn’t I would’ve gone to the next one. I stand by my original statement, the best Regional is the one that hires you.