I've got to say this question seems fishy to me. :-\
I've got a couple of my own to ask, if you don't mind. Where are you from (regionally speaking)? And when might you have been in the area last to know of these stations?
I'm trying to figure out how you knew that calls WNBX were repeatedly used in the upper valley, but did not know they are no longer in use now. I also find it interesting how you've referenced two clearly Upper Valley radio stations, and one Rutland one, and using all-caps for that.
So I'm going to answer this question inconclusively partly because I have no idea who you are or why this information would be useful to you, and partly because it's been a long time since I've been in that area.
WNBX for a while was talk-radio WNTK's Lebanon FM (and later used temporarily as WCFR-AM calls until its originals could be restored), both stations owned/leased by Koor Communications. WNTK is a talk-station and it sort of has a dual-personality. Bob strives to put local people on, but is also a big fan of syndicated programming also.
I've never heard WSYB, and know only that it's a sister to WZRT and from the boards sounds like a fairly big favorite in Central Vermont, but I don't endorse it because I've never heard it.
And WNHV, lol (note the transposition of call letters), last I knew was simulcasting with WTSV as "The Score" and/or perhaps ESPN radio. I'm not much of a sports guy so I can't give you an honest evaluation there either.
My impression is that when Vox Radio Group owned The Score, very little of it was local except for high school games. Since Nassau took it over, I couldn't tell you anything about it.
My advice is: if you're in the broadcast area, then sample these stations for yourself and be your own judge. You will get many a varied opinion on these stations by various posters here. Your best bet to scoping out which stations are available in your listening area is to research it on
www.radio-locator.com .