Hyatt Regency Sarasota - Never been to this property, but the location is decent for accessing Downtown Sarasota (short walk) with lots of nice restaurants and shops. Also a short drive (about 2 miles) to St Armand's Circle which is another nice area of restaurants/shops and a very beautiful beach right beyond.
Hyatt Place St Augustine - Obviously not gonna offer a "higher end" feel, but it's brand new and there are some nice-looking shops and restaurants in the area (never been to any of them) as well as a short drive (3-4 miles) to downtown St Augustine which is extremely nice. Loads of great restaurants and shops in a very charming and unique setting. The hotel is also very close to the beach.
Hyatt Place St Petersburg - The location is fantastic and the property feels fairly elegant for an HP. It's still just an HP but if you're gonna consider this class, then this hotel should certainly be included.