Add the Mavic MA40 to the list of rims. I built a set of those for a 240 lb velodrome rider, and they never needed truing. As with te above posts, 36 spokes with a 4x pattern would be good for a guy of your size. If you decide to get wheels like these, find a good local builder then find a deal on the parts. $50 in labor will get you a set of wheels built for YOU, not the average joe out there.