I guess I'm wondering if the quality would show thru somewhat on a scanned black & white print from a 4x5 neg??? I was at a client's house who was into 4x5 and he had B&W prints framed thru-out the house. They were absolutly incredible - they have a certain 'depth' to them.
I shot medium format for quite a while. I really liked it. As you say, a great compromise. One of my favorite shots is this one from the Detroit GP with a 210/f4 lense. It's an 18x26 inch print from a 645 transparency. The detail is excellent - small stones and pieces of rubber no larger than popcorn kernals are clearly visible along the guardrail.