No, but I evaluated the issues of space, flexibility, fuel and usage, and I decided to go with more batteries (8d AGMs x 3), solar panels, an alternator upgrade and a Honda EU2000. I'm working quite hard not only to duplicate systems (within reason), such as genset AND wind-up starter, solar panels AND separate windlass battery, but also to run a fairly energy-efficient boat (manual pumps, super-insulated fridge/freezer, water heater from the heat exchanger, LED lights).
This isn't always possible for everyone, of course. I have the space and a positive incentive to put three times the usual battery capacity plus a fairly high end inverter/charger. I also carry 140 gallons of diesel. But my goal is not to run the engine often to charge the battery banks, but to charge underway whether via alternator or panels. The Honda is good for running power tools at anchor, or to lay a charge if the panels, controllers or alternators go phfft. I'll already be carrying gas for the outboard, and ten gallons will keep it running for two days straight. That's a lot of amp/hours for a easily stowed piece of gear.
As for your needs, perhaps you should check out the WhisperGen http://www.whispertech.co.nz/main/marine/
It really is a different approach, and I can see a lot of benefits in the marine application.