Any wall system you consider, you need to address theses issues: moisture infiltration, insulation value, strength under hurricane wind loads, how windows and doors are installed (sill waterproofing and flashing,crack sealing), exterior finish, interior wiring and outlet space and interior finish and make sure the Florida Building Code and Walton County accepts the type of construction you are proposing. A structural engineer is going to have to sign off on your plans to get a permit. Finally cost. There are a lot of interesting systems out there but there is usually a premium paid for systems contractors aren't used to, not in materials necessarily but in head scratching time and making sure every sub on the job is familiar with how you are putting the components together. Work with your architect and get some cost comparisons for different systems from your contractor. Moisture is your biggest enemy. You need to maintain a strong moisture barrier between the exterior and interior finishes. High humidity levels can and will cause mildew growth on the back of drywall and wall coverings that you don't see but could be breathing. Uncoated porous materials like concrete, concrete block, styrofoam and wood can wick in moisture so you need some other type of moisture barrier. Air conditioning dehumidifies in the summer but in the winter heating will not and can actually help mold growth. Codes and building officials don't pay alot of attention to waterproofing and moisture issues or good flashing practices for that matter so you, your architect and your contractor have to.