Matt - an active local diver here in NJ, I would also suggest the dry suit.
We dive because it's fun. Being uncomfortable is not fun. Being cold is very uncomfortable. Therefor, being cold is NOT fun!
The more comfortable you are, the more you will dive, the more you will enjoy it.
As to pony, I would say for sure to sling it. Until switching to doubles this year I dove with single 119s and 40cf bottle under my left arm. You truly don't even notice that it's there. I went with the 40 instead of the 30 because it was only about $10 more, and it's now going to serve as a stage bottle as I get into more technical stuff.
We dive because it's fun. Being uncomfortable is not fun. Being cold is very uncomfortable. Therefor, being cold is NOT fun!
The more comfortable you are, the more you will dive, the more you will enjoy it.
As to pony, I would say for sure to sling it. Until switching to doubles this year I dove with single 119s and 40cf bottle under my left arm. You truly don't even notice that it's there. I went with the 40 instead of the 30 because it was only about $10 more, and it's now going to serve as a stage bottle as I get into more technical stuff.