I think this is the key and my feeling. Most systems that get endlessly chewed over on forums are "reliable enough".
The only two issues I've had that became showstoppers in the field are: broken spokes, and a alu frame snapping (these things always seem to go wrong pretty much right at the end, thank god). So, I like steel and handbuilt rear wheels. After that, pretty much anything goes at least for touring in Europe.
It does mystify my why say Thorn are so evangelical about the Rohloff on one hand, and so absolutely dead against hydraulic discs on another - both seem to me the height of fit and forget and both difficult to repair in the field. What's the difference?
Steve, to stop the thread derail and ask a question to yourself - are their any brands of tourers popular in over there you're also considering? Just wonder if there's some other brands/options that are not well known over here.