i have an 05 Poprad (canti) and an 06 Poprad Disc. the Disc bike weighs 26lbs (with pump, extra tube, tire irons, patch kit). I weigh 200lbs and commute 28 miles a day on the Disc (when i'm not on the Madone). 1500 miles on the 05, 1000 on the 06, and i've had ZERO problems with wheels. The only trouble with the wheels is they weigh a ton.
Headsets tho, that's another story!