Try the Bike Lab on Federal Highway just South of Linton opposite the Cadillac dealer. Small shop that I feel comfortable with having bought my Synapse from them. Mechanic Jim is terrific and the owner Jeff also. Another shop you might try is Bicycle World on Lake Worth Blvd just off Jog. While a bigger store they are very friendly and I just stop in sometimes to break up a ride to shoot the breeze and see what they have.
Also feel the same about the old Velo's, bought two bikes from them and I walk in and have trouble getting someone to acknowledge me. Bike America is just a big box store in my opinion.
Good Luck