I always fly with Virgin. Reasonable fares. I will be staying at my parents villa next time, which is managed by my brother who lives in Florida. He's alaways on hand to help out if anything goes wrong, or if you need general help. He's lived there 2 years so knows lots of things about the area and can point you in the right direction for most things.
Beautiful villa, see the website for availability and rates:
http://www.solana-sunshinevilla.co.uk/index.html
4 bedrooms, private pool and games room.
£500 a week in Sept. But maybe email my Dad and say Alison sent you. He might do you a discount ;)
The dates you need are still available so far.
I hired my car from Budget on West Colonial Drive for 8 days for £117.
Cheapest attraction tickets were from mercurytravel.net.
I'll let you know if I think of anything else.