Another vote for 5x7 as a wonderful contact printing size. It also makes for a reasonably compact traveling camera. I took mine to Argentina with me and came back with some great stuff. You can also double and triple up to make diptychs and panoramics. Since I started shooting larger format negatives, I've gone over almost exclusively to platinum/palladium printing. Once you get your method down, doing pt/pd is not really that much more expensive, since you don't burn/dodge with it. Usually the first print is a good working print, and often is also the final print.
I agree about the 5x7 format. My Kodak No. 2 is becoming one of my favorite cameras to have on a trip alongside my 35s. I also agree with the fellow who stated that he likes the aspect ratio.
"Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."