I would highly recommend Roberto Smith's beautiful 83 year old 66ft "Winnie Estelle" for a sunset cruise. It's not a sailing boat but it is still in a class of its own. 011 501 226 2394 is his phone number (from the US). For the numbers of people in your group it's the perfect size boat.
#84460 - 04/16/0403:17 PMRe: sunset cruise on a catamaran