ChrisM once bubbled...
I don't know that I would base my decision just on that, depends on what kind of diving you are going to do.
Tropical warm water in a shorty? Pioneer 27 will do (can't speak to the Transpac since I don't know it) - If you can find an older batwing 18# even better.
Cold water with a drysuit? Pioneer 36 needed.
Need more info to base it solely on lift capacity
Chris
I said this because of his body and the lead he will need to submerge.