Let me answer for Ken (if that's ok with you Ken )
Get the 200g for your summer diving and then in the winter get a 300g if you are doing really long dives below 50F or alternately get a 100g vest from Janice to layer over your 200g.
Get the 200g for your summer diving and then in the winter get a 300g if you are doing really long dives below 50F or alternately get a 100g vest from Janice to layer over your 200g.