I talked to 5 different solar energy companies and Summerlin Energy was the best in several ways. They were very price competitive and even gave me a $2K discount (based on system cost) for paying cash.
The mounting hardware replaced the existing Spanish tiles nicely and should not present a problem for leaks as I have heard some mounting systems do.
I am still waiting to compare the power use over the summer, but so far I am energy neutral with the air conditioning running a little.