I went for 32 hole rims as 36 aren't as easy to source, DT swiss 350 hybrid hubs(ebike spec) nice beefy flanges. The rims are stans grail3 although if you plan to run wider tubeless tyres than 40mm i would look at some of the dt swiss offerings. Can't say I'm sold on tubeless for touring and will probably give
tublito punctureproof tubes a run for our next tour. The Grails held up fine on gravel with the odd single track but are not bomb it down a steep offroad track rims.