The first question is where is the intended use? Good fuel capacity and stability in "rough water" is VERY relative to where you intend to run.
On the Northern Gulf Coast a marginal fuel capacity may be 300 gallons for a day's run, depending on your powerplants. (Avoid a single way home up here!) A minimum range for a good Gulf boat for spearfishing between Mobile and Beaumont should be at least 250 miles on plane, but 300 or more is desirable in case the world turns brown and you have to head to a different port downwind. On the east coast of south Florida 60 gallons may be more than enough since all dive sites are relativly close to shore. A Gulf run may be 40-50 miles to the first dive from the dock, while from Boca Inlet it's about 600 yards to a mile and a half.
Sea conditions also determine what works in your area. The Pacific boat has to handle big swells well, but won't usually see much in the way of a significant chop in weather a small boater is likely to be out in. The South Fla, Gulf, or Great Lakes boats won't EVER see big swells, but may see a 10' to 40' chop. Most small boaters in the Gulf will stay home in chop predicted to be over about 5', but thunder storms do happen a lot and can double the local wave height. The middle east coast of Fla up to the St. Lawrence can see any of it! The hull requirements are quite different for each environment.
That said, the cats handle chop well, and do reasonably well in swells. They generally don't have the fuel capacity for a long day in the Gulf and are somewhat limited in onboard storage capacity if they do.
FT
