The owner of my lbs uses Bontrager Aleous rims on his madone and he has to be between 250-300lbs. I've never heard him complain once, in fact he swears by carbon rims. He uses carbon rims on his mtb's also, so I would think you wouldn't taco rims. I would say that Psimet would be my first choice in aftermarket/high end wheelsets though.