We’re now struggling with all the component choices. The biggest considerations for us are reliability, serviceability, and ease of travel (eg, I'll be able to break it down and rebuild it on trips with little risk of screwing something up).

Based on this comment and your answers to the above questions here are "MY" suggestions.

1. Frame - buy a frame that only requires the use of 4 connectors, more connectors make it harder to line everything up and offer more chances to screw things up.

2. Wheels - use some proven wheels for your travel wheels, take a look at Topolino wheels for fun light
Local wheels.

3. Components - Shimano Ultegra 6703 shifters, Ultegra or Dura Ace derailleurs, the new Ultegra cranks, we just installed them and the because of the new chainrings the front shifting is outstanding.

4. Dura ace calipers. Discs can get bent when traveling. If there is a very steep down hill then stop part way down the hill and let them cool off.

5. Chain drive for the timing chain, simpler to install in the field.

6. Thomson seat posts and stems.

7. Carbon handlebars front and rear.

8. Wipperman chains.

9. 10 speeds!

Wayne