From reading this board for ten years, from memory two places stand out. First is Ultimate Granite. They had a granite yard in Wildwood until about 6 years ago, then moved to Rolling Acres Rd to have more room. They are the place that other installers buy from. They now have their own installers and advertise in the Sun weekly and every review I've read on here, people have been very happy and their prices seem to be the best.
Ultimate Granite- Stone & Quartz Specialist in Tampa, The Villages, Ocala and Sarasota
The other is Duncan Stone out of Tavares the other side of the Leesburg Airport. I can't count the number of times posters have complimented their work.
Duncan Stone
Here are some search results from this website, which is the quickest way to find results.
Recent review for granite countertops?
Granite/Quartz countertops warehouse?