THE BONES. The 3500 SCR's standard equipment list is comprehensive-even typical add-on items like a complete canvas enclosure with side curtains and an aft curtain, a bow lounge cushion, and a 16,000-Btu air-conditioning system are included. To protect against corrosion and maintain proper temperatures for efficient operation, freshwater-cooled engines are also standard. As a comparison, the Cruisers Yachts 3572 ($223,110 with twin 370-hp MerCruiser 8.1L Horizon gasoline V-drive inboards), a longer boat by virtue of it bow pulpit, also includes these features. Wellcraft's 3700 Martinique ($209,995 powered as our test boat) is also a contender. With the exception of freshwater cooling, it, too, has an extensive standard equipment list that easily rival's the Maxum's. So why are these other two boats more expensive?