I have no need to wear any lead with a steel backplate/steel tank. Integrated weights on a BC is bulky, not streamlined and adds drag threw the water. Comfortable for me is being very streamlined and slipping threw the water like a dart. Hope this helps.
Having a LP 2400psi OMS 85 steel tank is the same size of an AL80. You can get a better fill with the LP steel since it doesn’t heat up as much. I fill my LP tanks anyways to 3200psi and that gives me 105cu/ft of gas. Not being charged as a HP fill. In only 30 air fills I just re coop’d the extra cost of the LP steel tank. Steel tank will also last longer and have a better used re sale value.
FYI. All diaphragm 1st stages are environmentally sealed.
Hope this helps. Mike