I decided to go with this company because I liked their approach of reducing demand, which means a smaller system could be built. This involved switching to all-LED light bulbs and duct sealing. They also offer a demand management system.
Re the duct sealing, this was "very well done," according to the guy who cleaned my ducts.
I found them to be professional and easy to work with. They did all the paperwork with APS, showed up when they said they would, and answered questions. After installation, the sales rep provided assistance with the APS rate change. I have no hesitation in recommending them.