Since you are in NOVA, my primary quote was from P.E.G. Solar, who was very prompt in responses and ultimately what I used to drive my Tesla rate down. They also do a lot of youtube videos about solar installation and information. (The guy Joe who does the youtube videos is the one I was talking to in my quotes) Their quote not only helped in bringing down my price but got my included panels upgraded (on paper to Tesla 325 Panels) which got upgraded again on delivery to 330 panels. Tesla could be a little slow in response times but having all of their paperwork and installation progress all shown through a web portal was a nice plus.
Also, keep in mind that when you get a quote on EnergySage, the initial numbers are fudged. They are based mostly on the data you fill in and assuming no obstructions on your roof, setbacks for code, etc. In reality, those things change. You have restrictions on where you can put panels on your roof, etc. Just use the company leads and contact them.
My installation actually started on Friday (the 4th) and will resume tomorrow. I was really impressed with the electrical guys (Both of which were former solar city employees) and spent most of the day talking with them as they worked. They really knew their stuff and had no problem talking me through what they were doing the whole way as they did it so I understood how all of the new wiring worked. They were very friendly. I had no delays at all with my powerwalls either.