Lady G'Diver
New
I would absolutely recommend a HP steel tank. Either 80 or 100. I dive cold water and wear a 7mm with a hood. The steel tank is negative bouyancy and will allow you to carry about the same amount of weight that you would carry for warm 1 mm waters. High pressure ensures longer dives and the size of the tank is small in comparison to low pressure.
Good diving!
Good diving!