Mavic Aksiums
Cheap, durable (what you seem to want), Cheap.
Expect to pay around the neighborhood of $150 for the SET. Can't beat that. Plus they are more aero than a lot of wheels that cost 3xs as much. I know this for a fact because I have these as my training wheels as well as some customs. Aksiums are actually more aero on flats.
or CXP33 if you keep your hub