I have stayed at the Ritz and the Gaylord.
Of those you cannot beat the Ritz. If you want true deluxe that is your hotel. I would think the JW is also nice, but a step down in service. They share a pool area with one pool themed as a spa pool, (great lounges) and a lazy river pool. I loved the place and can't wait to go back.
Gaylord is very nice, but it is a convention hotel (Think HUGE!) Also, my room had a shower only.
The Westin downtown gets great reviews and there is a new Omni at Champonsgate which had some good opening rates recently