Sprung leather saddles are nice on touring bikes, but are weighty and noisy. Carbon posts tend to slip, Salsa Shaft is squeaky

Go for Thomson if you can afford it, but basically almost any two-bolt micro adjustable will do fine. Selle Italia saddles to try are the Flite, SLK, SLR and XO (cheap!). Also, condider WTB saddles if you dont mind the design