I have a Genesis fortitude adventure. With the stock rims I have gone down to 28mm tyres, was surprisingly nippy. Certainly glad I bought this instead of a cantilever equipped tourer.
As for luggage I run either a carradice long flap camper or a tortec expedition rack with panniers.
It's handled offroad bivvy nights too, currently awaiting a frame bag from buggybag, should be here this week.