Built by Curvelle shipyards in Turkey and delivered in 2013, the 111-foot Quaranta, which is available this summer in the Mediterranean for around $130,000 per week, is both speedy and spacious. As the largest carbon hybrid superyacht catamaran in the world, the yacht employs a flexible cruising speed of between 10 and 18 knots while using less engine power and fuel than its competition. (Inquiries: Hill Robinson, [email protected]; hillrobinson.com)