cripter,

What kind of riding do you do?

Open pro's are a great all around and if built correctly( # spokes and spoke types) will last a long time. The CXP 33's are more aero and heavier which means they can take more abuse.

I have not used the Ambrosio's but have been eyeing them for a while.

There was a guy on Ebay selling old Mavic open (NOT open pro's) 28H rims for $20 delivered to your door. He had a hundred of them. I was wondering if anyone had an opinion on these NOS rims from the 80's and 90's. What is the difference between them (open) and the new(open pro's)?