.$02 is to not get fixed on frame materials as a touring bike is essentially a truck. Maybe a nice handling truck but not exactly the place where light weight materials matter unless you ride ultralight and your body is ultralight. But if I was walking around with wads of dough a custom Pinion gearbox w Gates drive would be cool. Actually a custom Pinion drive w geometry similar to Rivindell’s ClemSmith Jr would be it although I’m not sure a disc fork would give the spring the Clem has. Ok, hydraulic disc rear and normal rim brake front.