The EWR potential would be sweet indeed. Just be advised that marketing moves that around a lot. EWR trips tend to be less desirable for the category over all (although the few in each category that live there obviously prefer them) but if you have time, look at the bid packs for the last year for the 3 domestic categories (the ER usually only has one AMS per day or something like that, which often go to the few local line holders unless they sick out) so you will have a good chance to pref whatever does pop up.

There may even be someone from marketing/crew resources/etc come in to class before you lock in your bid and you can maybe pick their brain about projected EWR trips for various categories. Still though, if you track any one category for a year, you'll usually see EWR trips ebb and flow and its really hard to say which domestic fleet, if any, will average getting more than any other. That's probably why the larger domestic categories (88 and 73N) could be better; their sheer size would usually mean more EWR trips available in any given year. Usually, but not always.

In any case, living there, as long as you can get to LGA/JFK no problem, will be a pretty sweet gig for you no matter what plane you get.