You've been to the shows to see the machines ... did you try them out?
Because you are searching for an automated machine, when you test drive the machines you are mostly going to be concerned with how to operate the software, the mechanics of the frame, and the mechanics of the head (changing needles, thread, setting tension - etc), but not manually moving the machine. If you've not done that at the shows, then my suggestion would be to go back and pay particular attention to the software part of the setup.
Other than that, support and training classes are going to be a key component to your purchase. I would suggest starting with local dealers and the machines they offer.