Interesting topic, which I hope I'm not stealing the thread. I do Sag touring, and at end of each segment, there is always light hearted duel of wheels. I'd be looking at 25mm tyres.
Specialized S-Works Roubaix
Now that's an extreme recommendation.you have set my heart on fire with desire. I'd change the cog set to 12-32 and be done.
http://www.specialized.com/us/en/bik...red-disc#specs