The three quotes were very useful. I secured one additional quote from a supplier that exclusively deals with micro inverters, since I was interested in these. In the end, I decided not to go with this because I thought that what I was getting for the same price was not as good. One of the quotes sent sales person, but he was making claims such as the panels were made in Europe where as they were made in Asia. Not that I minded they were made in Asia, but I felt he was not telling the truth.
Another supplier initally offerred me a higher quote for the same system as the one I went for, then offered much lesss, but I went with the original one (Replaenishible Energy) because I felt they were the most honest.