I'm not familiar with any of these cranksets, but be advised that Ritchey issued a recall earlier this year for certain WCS and Pro cranksets: http://www.cyclingnews.com/tech.php?...008/news/01-23 (page down).

If you decide to go with the Ritcheys, make sure to double-check the code stamped on the inside of the non-drive crankarm.