[tandemracer]

Proper fit is everything when buying a bike. You are tall enough that there aren't many choices for production bikes that will fit you well. Make sure that your shop has plenty of experience with professional fitting tools such as a Serotta Size-Cycle so that they can get you set up properly before you sink your money into a mistake. You don't want to have to rig a stock size frame with such a long stem that it shifts too mcuh of your weight to the front wheel. You also need to be careful of putting really long cranks even if they fit you) on a bike that isn't designed for them because you will reduce the pedal clearance and may end up clipping pedals against the ground when turning.

Zinn has more expertise than anybody in the country in dealing with tall cyclists. It is worth talking with him for some advice or even springing for one of his custom frames. Serotta also does a good job with tall frames. Check with Craig Calfee if you are dead set on carbon.

PM me if you want more advice. I worked in the bike industry for 18 years selling and fitting high-end custom bikes, so I have a little experience with this subject.