Sorry I am late to this party.

I ride a Co-Motion Mazama. Although this model is discontinued, Dwan @ Co-Motion will work with you personally to custom design any of their bikes. I've had this bike for almost two years and NOTHING has gone wrong...Not even a popped spoke. My weight range on this bike has been between 325-345#'s and I have ridden it 4,500 miles.

While searching for customs, I found Co-Motion to be the most reasonable choice. I'm sure Dwan can "beef Up" a N'orwester or Americano for you if you need it.