Well , I don't work for any of these airlines but I can offer you my opinion based on my research of how commutable different places are. I am looking at the same thing too except I am coming out of MHT. PHL and DCA seem very commutable depending on weather. I would check an airline timetables. Thats what I do. Find out how flights they have per day to that destination. For example if I went to AWAC based in PHL and wanted to commute I would use US Airways because they have APPROX 10 daily departures from MHT to PHL starting from early in the morning to late in the evening. I would use US Airways for the northeast corridor they seem to have plenty of flights. As far as DTW DFW I do not know too much on those destinations.
For Airlines I have heard AWAC is not very commutable but again that is a matter of opinion, though it would probably be almost impossible on reserve. Eagle I heard juniors guys and gals are going to SJU and ORD so I would check flights their. In BOS the most junior guy on EMB was hired MAR 04 and he is still on reserve. So I would not want BOS as appealing to me as it sounds thats too long for reserve. Pinnacle I don't kow much about and ASA I only know their domicle I believe is ATL so I would check flights there.