I suggest finding a localsolar energy installer. When choosing a solar installer you should use the same methods that you would use when choosing a builder, doctor, plumber, etc., check their experience and references. A local installer will be familiar with your specific climate and what type of systems work best in your area. Then get a second opinion.
Check the yellow pages. Go to your local energy fair. Check with your local or state chapter of the American Solar Energy Society and/or the Solar Energy Industries Association.