Get in touch with PARA, the Professional Audio Reatilers Association. They can tell you who is a member in the Ocala area. This is where I would start when dealing with an installation away from where I live. Being a PARA member doesn't assure quality but you have some standards the member must meet and problems can sometimes be resolved with PARA's assistance. However, the best assurance you can get is to spend some time with the dealer/installer. Once you are comfortable they know what you desire in detail, ask for a few recommendations of past clients. Call them or better yet ask if they will allow you to view and hear the finished product. Make your decision and get everything in writing with a provision for dealing with problems after the install is completed. If you haven't chosen the equipment yet, I would work with a salesperson and an installer so you have two people checking on each other.

Sound Ideas in Gainesville.
PH: 352-378-0192
Great bunch of guys, too.