Can't stress this enough. Track errors ~4 days out are in the 150 mile range and a track shift of 50 miles could mean the difference between 1-2" of snow then 1" of rain washing it all away vs. 6-10" of snow for the 95 corridor, for example (Philly-Trenton-NB-NYC), meaning we likely won't have a good handle on this for a couple more days.
And like some past storms, even once the track is pretty well nailed down (1-2 days in advance), this is likely to be one of those storms where there will likely be a very steep SE to NW gradient, i.e., it's quite possible we could see something like no snow in AP, 1-2" in Holmdel, 2-4" in Edison, 4-7" in Warren and 8"+ in Hackettstown (where places with less than 8" are likely getting the rest in rain or some sleet); this is just an example, not a forecast.
Also, if you really want some good analysis, watch TWC. They're comparing model runs and analyzing the key variables very nicely right now.