I finally wound up doing the install myself.
Arnost/IDS gave me a reasonable quote, but I could never get him to actually come do the work.
I almost went with Maxtech (maxtechseattle.com). The guy I talked to was Erik Yurkanin. Very professional, and I think he would have done a great job. In the end they were just too expensive though. Labor was $75/hr, and after 2+ months of research while looking for an installer I felt like I had learned enough that I could do it on my own.