Steve Huff, who's primarily a Leica shooter, posted a review of the K7 based on his perspective as a photographer who is not enamored with large bulky SLR cameras. As I shot early on in my career (60's through early 80's) with M4's and Summilux and Summicron lenses, I also enjoyed reading his observations about the FA 31mm and 77mm Limited lenses, as well as his comparison shots with the 35mm Summilux and the FA 31mm Limted. The link to his blog and review is below.
Pentax K7 Real World Review