Join Date: Nov 2007
Location: Boston, MA
Bikes: '07 IRO Mark V, '01 Cannondale Jekyll 3000, '07 Rivendell Atlantis
Ditto on the B 17. Although CliftonGK1 gives good advice as well getting measured can be helpful especially if you're bigger than average (which if you're on this list you probably are). If you don't want suspension but want a little spring you could looking into a B17 flyer (it's got springs in the back). I hear rumors that they're super comfortable, I'm considering getting one for my touring bike. Brooks is doing some product testing with BF members on a new saddle with a cut out called the B17 Imperial.
Link to thread with reviews of the B17 Imperial
Brooks Imperial Saddle Reviews
Some people like them a lot some people hate them. I'm one of the people that likes them. Rumor has it that it will be out in October.
2009 Bike Friday Season Tikit (commuting folder)
2007 Rivendell Atlantis (touring, general riding, errand runner, stuff hauler)
2007 IRO Mark V (SS)
2006 Rockhopper Comp Disc (Icebike)