DR v KTM
I realise these are different bikes in many respects but do you think the DR could be as good as the KTM, even simpler with air cooling. There is a 790 big bore kit as well that takes the DR to 55HP at the wheel apparently.
I realise this is a bit out of context so ignore it if it risks widening the thread too much.
Your prep is getting me thinking along the lines of a single for an across Russia ride although mine will be less certain that your's for some time yet.