I have 2 sets of Ksyrium SSC wheels--one set I bought used with a couple thousand miles on them and the other I bought new. I've been as heavy as 250 (maybe 248) and am currently 235 right now, and have put hundreds of miles on each set with zero issues. None. You'll hear similar stories from many on here.
Mavik Aksiums also seem to be well reviewed by Clyde's.