All good suggestions and carefully considered. As I am still limping, I chose to go with a pintle hinge. After installation I found the companionway ladder to be very secure. It takes a little more effort to align and reset once removed to get at the engine box but I don't think it will come from under me again and that is worth the extra effort to get it back in place.
Nova's refit is underway again after the post "Hurricane Ike" party circuit has been exhausted. Cabin is completely stripped of vinyl and decayed teak vineers, hot water heater has been pulled out, diesel is running, and renovation of the 12V electircal system is currently underway. Adding some cabin lights, an automatic bilge pump and new stereo system.