Heh, I've had my fair share that would hit the limit in the 25-28mm. In particular the shimano SLR/dual action/dual lever or whatever they are called.
I don't agree with the "gap is much smaller than people would expect". Have you tried a decent hydraulic brake? I raced on and off road, was a bike messenger, designed and built (from tubes) a mtb frame, and bike commuted nearly every workday of my life. Disc brakes have significant advantages over any rim brake.
Don't knock them till you try them, I was dubious myself.
Heh, I don't doubt that they are powerful and I sure won't bend over backwards to still get rim brakes next time I want/need a bike, but the "want" isn't exactly strengthened by the switch. And yes, even aluminium wheels aren't really a joy decelerating in the rain (and yes, I've been to that group ride where one guy could show off his nice new aero carbon toy while my nice new aero carbon toy had to stay at home because for a dozen hours of mostly rain as a rim rider your choice will definitely fall on the one with the aluminium wheels. I guess I just can't warm up to the idea of front wheels with twentysomething spokes. It's confusing enough already that carbon front wheels (for rim) almost universally come with 18 instead of 16, what's up with that?
Er, not sure on the spokes. Why not use 18? Is 16 better somehow? I'm over 200 pounds and am hard on wheels, I've been pretty happy with Santa Cruz carbons, which in the road flavor are 24 spokes.
I don't agree with the "gap is much smaller than people would expect". Have you tried a decent hydraulic brake? I raced on and off road, was a bike messenger, designed and built (from tubes) a mtb frame, and bike commuted nearly every workday of my life. Disc brakes have significant advantages over any rim brake.
Don't knock them till you try them, I was dubious myself.