Congratulations Memphis Queen!! I stayed in a lovely village about 45 minutes from Florence called Il Borro. The Ferragamo family has restored the village and you can rent apartments in the village or farmhouses for larger parties close by. They have a lovely chapel there too. Your whole party could take over the place. Their website is as follows:http://www.ilborro.com/agriturismo/i...a=288&lang=ENG

I do agree with donlind that Ravello or Taormina would be lovely. They are both beautiful spots. For Ravello, check out the forum in Trip Advisor. Many people post about their weddings on the Amalfi coast and their wedding planners.
Good luck!