Really good advice. I should clarify the 40 degree water. I don't ever plan on going anywhere near 40 degrees I just thoought that would clarify I'm absolutely never doing ice diving withought rethinking my entire rig. Then money would be not object - I like to be steamy warm.
The farthest North I can see is visiting my kids in Nor Cal. So what high 40's low 50's??
Thanks
What are you using now? Perhaps all your regulator needs is a good service and adjustment. If not, you might be able to get away with just a different second stage.