This is going to freak people out, but these machine-built Performance Titan wheels have been flawless for me after I wore through the rims on my flat-bar road commuting/touring bike: http://www.performancebike.com/bikes...1#ReviewHeader

Only 16 spokes in front, and 20 in the rear, and I commute with up to 20 lbs in a rear pannier (maybe about the same on a tour). Never broken a spoke in 2000 miles so far, and only trued the rear a bit shortly after purchase. I do use the Performance 35mm wide tires on them...and they do have deep triangular areo rims, which are probably tougher.