Plus 1 for the Brifters. If you're used to them and enjoy them, why not build your touring bike with them. I know all the reasons for not using them (finicky, will break in the middle of nowhere, etc.) and I know that makes sense on paper, but i've never experienced a brifter failure in tens of thousands of miles of day-riding and a few tours. I doubt the brifters know whether they're on a multi-week tour or are just being ridden four days a week from home.

But even if you don't want to take a chance on it because you'll be in the middle of absolutely nowhere, why not just take a spare pair of DA downtube shifters on the off-chance you have a failure? The brake lever parts are no more likely to fail than stand-alone brake levers, so it's only the shifter mech people are worried about. Seems like an easy fix to me on the off-chance something happens to brifters.

For me, brifters seem hard-wired to my brain -- I think "maybe I'd like to try the 16 instead of the 14 I'm in" and no sooner does the thought flit across my mind than it has happened. Barcons are an effort, and I'll often just choose not to shift rather than move my hand. Downtubes even moreso, but in my scenario they would be a fix of last resort.