I have been riding Rolf Vector Comps for two years on my Bianchi and my Trek 5200. Over 4,000 miles on my one set with no problems. I am looking to upgrade to a top of the line wheelset, but am not sure which one to go with. I am a big rider (6'5", 235lbs) and a wannabe racer.

I think I prefer the Shimano Dura Ace wheels, but heard they were not recommended for big riders.

Suggestions?

Welcome to Bikeforum.com, Cthomas, hope you'll enjoy your stay here.:beer:
Go for The mavic Krysirium, or the Mavic Cosmic Carbone, you'll love the wheel set,

See my post under "rolf wheels". I'd recommend the rolf wheels for someone your size, but if you aren't racing and you like the ride of the shimano wheels, use the rebate and get those wheels. The internals are the same as their regular hubs so they're easy to repair and overhaul. And other than the lateral flex under hard cornering, they ride very sweet. Now only if the rolf vetor pro hub flange, spoke and rim design could be used with the shimano hubs, there would be a set a wheels!!!

ksyrium is good