I'd pick the bus. All the growth is there and lines are more productive (typically), though you do fly red eyes. I have been on the 190 a year and only have seen movement through additions beneath me which have slowed dramatically. The last bid should have 30 or so 190 Boston guys moving to Captain or the 320, so that trend seems to slowly be changing toward people leaving off the top as well as adding to the bottom.

However, at least out of Boston, all the DFW layovers are flown by the 190. Not sure about JFK to DFW flights though.