I agree with they only cost 75.00 but the lower alex rims don't have a good rep..

The mavic a719's would be the most durable but you cannot run real narrow tires on them.. They are basically a 700c version of a mtb rim.. Very solid.

I feel the Mavic CXP33's are just as solid in 36 hole.. They will cost you more but you can have them for years.. They have tremendous lateral stiffness and can take a beating..