Hello All,
I would add to the mix the issue of saddle setback, or lack thereof, on Brook's in general. The rails are shaped in a way that precludes as much setback as is common on other saddles. For me, this is a deal-breaker, rather than the width of the saddle. If your current saddle is already at the max setback position, beware. Or at least try a borrowed Brooks before buying. You should measure the setback on your current set-up to have a baseline measurement.
Good luck.
Alan LaVine
New York, USA