I agree with drfrankfree's suggestion about Jeff Weaver at ACE Academy in Norcross.
About Windward Tennis Academy, in addition to Torrey, there are other very good coaches. Will Wright and Henry Darko. Their academy is very highly reputed for girls as drfrankfree mentioned. There are some very good younger girls as well in their day time program.
I would suggest you to try out all academies suggested here. Spend some time when these coaches take private lessons for other kids, talk to them about what you want from them for your daughter and make your decision.