Re:
Shoot dude, for decades now some of the most aggressive down-hillers have been hard-landing MASSIVE air on 32 hole wheels (and less) with no probs or wheel failure whatsoever, so me thinks it don't matter a bit how well fed and portly (or tall and athletic) a body may be ... any well built wheel/hub combo should safely handle your touring/riding needs! That said ... the higher the quality of components you get (ie: Shimano LX, DX, DEORE, XT, or XTR ... the more you will pay ... but likely the longer they will last and provide a serviceable function.