OP, it depends on the type of driving you will doing in SW PA area year round. Are you going to be carrying a heavy load in the JGC? Remember, it is Q rated and you have to watch your speed so that you do not run over the limit for a long period of time.
As for winter driving, the specs indicate you should have no problem and the option to add studs if you need them. Typical an AT of any sort that is geared for snow and ice with the mountain flake symbol are not as soft in the tire compound as a dedicated winter tire for that increased traction. But they are far better than the standard AT tire that many use in the non snow belt areas. Here in the Northeast and Midwest, you should not have a problem.
Over the last couple of years, Nitto has refined their product line with various improvements. Also from, Nitto look at the ECO Grappler and others here in the forum have suggested the GY Duratracs and BFG KO2. Plenty of threads to search and get options on.
Best for now.
Laredo X, Trail Rated, QTii, Sele-Terrian, Quadra Lift, Off-Road Adventure Package ii, Nokian Rotiva AT, Tow, AFE CAI, DiabloSport inTune 1000-DCX, Custom Sound System ( HAT speakers, JLAudio , Pioneer , JBL MS-8 & RF 3.sixty.3 -- see the writeup link below for more details)