Owww! No experience w/ carbon saddles here, but with roads like the rough, bumpy rural ones I have the "pleasure" of riding on more often than not, a rock-hard saddle would be absolutely miserable....don't know what roads are like your neck of the woods, but I would think that would make a big difference. On smoothly paved roads, a harder saddle would be doable, I think.
Emily
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow