I vote Papa, and here's why. The Ohio is the most powerful SSGN of all time but it has a problem, it is very uncool and unexciting. The Papa meanwhile, is the GTO of SSGN's. It has a titanium hull, a liquid metal reactor, 10 SS-N-9's and once roared along at 44.7 knots. It was one of a kind, which is unfortunate for the Russians because I think a large class would have scared the s#^% out of NATO.