Some decent hubs on Kinlin XR-270 or XR-300. Light enough and cheap.

If you are worried about breaking carbon rims, don't buy them. i don't understand why people expect Racing equipment to last 5-10 years. It simply was not designed to last forever. My expectation for racing equipment is 2-3 seasons, any more its a bonus. But rarely do I reach the 3rd season because I sell it to get new stuff.