Depends on your tolerance. You can get away with a 4/3 in NJ/NY . Need thick gloves and booties though. Def invest in the FTS poncho makes changing a whole lot nicer in the parking lot.
Back in the day my first hooded full suit that I used through the NJ winters, an Oneil 4/3 Heat with 5 mil boots & 3 mil gloves. The coldest days I also wore a 2 mil vest. Today 5/4, 5 mil gloves & 7 mil booties.
depends on how long you want your session to be.... want to be in the water for an hour and get pretty cold toward the end.... save money and get a 4/3, hooded vest and 5mm gloves and boots. want a longer session... get a 5/4 nuff said...
same here… first 'winter suit' was a 4/3 Xcel. Back in the 90's… had the vest too… not too fun. i'd rather be over suited and sweat than freeze. performance when too warm > performance when too cold.