I would like to know if anyone has been on a western caribbean cruise out of Mia ( Grand Cayman, Roatan,Belize & Costa maya) and a eastern cribbean out of Mia ( San Juan, St Thomas, & St Martin). If you have been on both, in your opinion which one did you enjoy the most? We are planning a cruise for Jan 2008 and not sure which one we would like to do. We know we want nice weather and shopping.