The one thing that puts me off a Capreo is the non-standardness. Eg, I understand I can't use an American Classic hub, is that right? And when the cogs are worn, big expense to replace.
Yep, you have to use the Capreo hub so you're limited - also no weight savings there. As regards sprocket wear, I guess it would depend how often you used the 9t and 10t, but as they are both 100"+, (with a 54t) probably not that often.