I expect Sustr to go to New York. He isn't ready for the NHL, and likely knows that. He should go to a team that has a record of developing good defensemen and will have a need for the sort of player he can become in 2-3 years. Seems like an obvious fit.
The Rangers didn't do so well with their last college free agent though (Gilroy). And I would think he'd want to go to a team where he has an easier time cracking the lineup. Not sure he has that chance with guys like McIlrath ahead of him on the depth chart.