It basically depends now on how fast it moves. Accuweather is doing some serious bet-hedging - forecasting 6-12 with a possibility of up to 18 inches.
Models have shifted back towards a phasing situation with the arctic and polar jets. If this happens, someone will get crushed with 20"+ snow and near blizzard conditions in my opinion. No telling where that will be at this time though, looks best from N NJ into SE Mass.
There is word that this may be a classic Kocin/Uccellini (if you know them) storm. It's definately fun to watch, should be the biggest storm in a year + for many areas.
Down here in central Maryland, the forecasts are showing 6 to 10 inches, but I generally do not have a whole lot on confidence in them. We will get what we get and deal with it the best way we can!