I just viewed your Flickr albums and was very impressed with the high quality of your images. Since we shoot with similar photographic equipment and we both use an Epson V850 scanner, I have a few questions to ask.
I primarily use my RB67 to shoot individual portraits and still life.
I primarily use my 4x5 inch camera to shoot landscape, architecture, and still life.
Based on your Flickr images, I noticed that you recently bought a Chamonix 4x5 inch camera with 75, 150, and 300mm lenses. What was the fourth lens you purchased? Comparing the 4x5 and the 6x7, how much difference do you see in image quality?
I also noticed that all your portraits were shot with an RB67 medium format camera. Since I have never used my 4x5 for portraits, how significant is the ergonomic difference and image quality difference between 4x5 and 6x7 for individual portraits?
Plus, now that you also shoot with 4x5, don't forget to change your Photorio.com shooter description from "Medium Format" to "Multi Format."