No argument about the top end of the C14, deb99, but I had the opposite impression about the Concour's torque down low. I still had my 99 Valkyrie at the time I test rode a new C14(2014), and I was severely unimpressed with the overall vibration and lack of low end grunt. I still like the Concours, but I couldn't wait to get back on the Valk after that ride. And other than the rider triangle being more confined, the F6b is an even smoother version of the Valk.
Jason