I am located closer to the west coast, but decided to start in NA east since all my friends were starting there. I haven’t noticed any issues from increased ping, so I wouldn’t worry too much about that if your net is reliable.
The matchmaking for T3 content in NA East always seems to be really quick. I rarely wait longer than a minute or two for guardians or abyss dungeons.
I’m on Regulus so I can’t comment on any of the three NA East servers you listed, but I my vote is definitely for you to start in on NA east. I will say that login queues on Regulus have been so infrequent I can’t remember the last time I’ve seen one.