M.F.
My cousin and several teachers I know use Church of the Palms and are very happy there. They have lower ratios than most places, but are also a little bit more expensive. They do have both full time and part time programs and are geared toward the educational side. They have a web site: http://www.palmspreschool.com/
I have also heard good things from parents about Bright Beginnings and about Concordia Lutheran on Wood Street http://worknotes.com/FL/Sarasota/ConcordiaLutheranEarlyCh....
Good luck with your child care search, and with moving again.