Hey Susan, Welcome to HomeTalk. Lot's of great Talkers here.
US Windows does a great job
Susan, check out this link, it will give you a listing of manufacturers and products that have been approved here in Florida as being impact resistant: http://www.floridabuilding.org/pr/pr_app_lst.aspx
That assumes you are looking for double-hung windows. If not you can change the search parameter to what it is you want to have.
Yes. BetterBilt or PGT are excellent brands and both have impact glass windows available here in Florida.
We have a sister company in Tampa(Moresi Construction) that can come out measure and give you pricing for replacement & repair of interior & exterior finishes. Contact me (email@example.com) if you are interested. They are state lic. & insured.
Vista windows are great! http://vistawindowconnection.com/