Seeing as we have about the same builds, XL, I agree w/chelboed that good strong wheels are your 1st priority.
I have been running ZTR Flows w/36 spokes - 2.5 yrs on the rear & hasn't needed any re-tensioning yet. Built by a very reputable builder, which is key.

'Durability > Lightweight' is my thinking when I build my bikes.


I'd suspect your BB/cranks to be next in line....