Overall, it is a great time to buy ANYWHERE in the US for a European.
Do your research well! There are certain markets which make more sense for the long haul, overall Manhattan, NY for example, is insulated from the sags felt by other areas in the US.
Your money is two to one roughly here in the US right now, so it really is a matter of your personal preference to whether the storm so to speak.
In FL, there may be a longer wait for appreciation, up here in NYC things are still steadily on the rise if not as fast as before. We are seeing less double digit increases up here than two years ago.
FL had a lot of condo development and thus some surplus.
Overall, you need to find out what would be the services and amenities for the area of interest, find comparables if any, then really examine the overall value of the place in question.