Thanks, Nacho! I think I sold my Alias', a Brooks Pro, and a few Sella Italias of differing flavors, at a bikie garage sale here in Ann Arbor. The S-Is were purchases in terrible condition, but dirt cheap to experiment with saddles in prep for a tour. I haven't gone back to that brand.
I just bought another Toupe Expert Gel 143 with Ti rails. I'm gonna again try my B17 Imperial and my B15 Swallow Select leather before I try the new Toupe, but keep an open mind. I also might swap the 155 Toupe onto the 650b Terraferma, and put the 143 Toupe on the ELOS Mondonico, with its more aggressive seated position.