We'd like to talk about two things - Sicily villas and country resorts in Sicily (agriturismo).
Our page dedicated to villas in Sicily doesn't just have links to some good villa rental agencies, it offers tips on finding and renting a villa. What's important is that you find the villa you want at a decent price.
"Rural resorts" are essentially rural bed and breakfasts, which in Italy are called agriturismo. They're also known as guest farms.
Both are great ideas for your summer holiday in Sicily.
(Shown here is La Rosa dei Venti, an agriturismo near Enna.)