I have received my 3170 this morning, and I am still shaking my head in disbelief. My 6x7 slides, color and b&w negs are sharp, very sharp.
Here's an example (Ilford Delta 400 in Ilfosol S) :
and a 100% crop at only 600 dpi with absolutely no sharpening or anything, straight out of the scanner :
When I ordered it, all I had in mind was to scan the few MF negs I have and return it. After spending the whole day with it (I even forgot to eat) I am keeping it, and seriously considering selling some of my 35mm equipment to afford a 6x7 camera (the MF negs I have now were shot a few months ago with a rented Mamiya 7 II w/80mm.)
Can the 3200 be any better?... Maybe, I don't know. I do know that I like what the 3170 gives me, at half the price of the 3200 (I am Canadian too).
Hope this helps.