I live in the Albany area, so I can break down those hospitals' ED's for you:
-Albany Medical Center is a level one trauma center. Very busy, lots of transfers in and holds. Doesn't pay that well, RN's start at $21 and haven't gotten raises in a few years, but they have a bonus program as well as a clinical ladder.
-St. Peter's is a smaller ED, still pretty busy. They use alot of agency staff, but they've been cutting back. Pay is a little more than AMC, maybe starting at $22 but no bonus program. Recently merged with Albany Memorial and Samaritan, so I imagine the pay at those ED's would be similar, although Samaritan used to start RN's out a little higher, maybe $24 prior to the merger.
-Ellis (in Schenectady) has 2 ER's, one is very busy, the other not so much. They don't use any agency, they are chronically short staffed, and they don't have additional resources to call in. Pay starts a little higher, maybe $23 for new grads, and they are union, so raises are automatic.
I don't know anything about Poughkeepsie hospitals, although I'm working with an agency nurse tonight who is from there, and is driving up to Albany for work, so that might say something...