Dear gods, a Brooks thread got derailed to a Mac vs Pc flamewar? I guess it really can happen anywhere.
That being said I like PC's, Mac's are so simple it hurts my brain, and its easier to build your own PC.
Back on topic:
+1 - B17's and Champion Fylers are designed to work for an upright seating position....as you lean forward more the saddle won't be as comfortable....although Brooks does offer models appropriate for more aggressive riding positions.
I'll argue this. When ordering Brooks saddles from Harris, they describe the Flyer as "The Flyer is most appropriate for cyclists who set their handlebars about the same height as their saddles, or perhaps a bit higher.".
Whereas the unsprung B17 models, such as the Imperial, are described as: "The B17 is most appropriate for cyclists who set their handlebars about the same height as their saddles, or a bit lower.".
I hope to prove this soon. I've had a Flyer since march, and I hate, hate hate it. Can't ride more than 12 miles without numbness, no matter how I position it on the bike. I'm returning it to Wallingford Bike, and have ordered an Imperial. This is to go on my T700, which has the bars about an inch below the saddle. With any luck I'm hoping that will solve the saddle problem I've had on this bike.