I'm 6'2" and 145 -150 lbs depending on the day. I have no less than three B17's. This talk of "breaking in" is over stated. I find the newer saddles to be nearly as comfortable as the old ones. My oldest has about 9000 miles on it, while my newest has around 1000 or so.
Brooks saddle break in is actually your backside being "broken in." The saddle changes are minor enough that it really isn't the saddle so much as you getting used to it. The first couple rides will feel weird and you might think you made a mistake. Then all of a sudden you will take your mind off of the saddle and NEVER notice it again.