From a three airline vet and currently with Comair, at this moment in time I would rate Eagle, ASA then Comair in that order. However, few things to consider and that is upgrade time and QOL. QOl can depend on many factors and those factors that are important to you and you only. SOme people consider reserve time and lenght. How that reserve time is worked with thier particular company. Some consider upgrades others domiciles and if they choose to live or commute to their domiciles. If your hometown is not that important to you, I would look at where these airlines have bases and if you would like to move there. Believe when I say that life is soooooooo much better when you live in your domicile. I personally commute and it sucks but I love where I live, so the trade off to me right now is worth it. So all in all I could have made this short and just agreed with the other and say QOL. I would choose Eagle then ASA then Comair in that order. Good luck in whatever you decide.