I have a pair of Easton EA70s, they are indeed the proverbial bombproof wheels. They've taken a brick wall head on at 15ish mph and hardly came out of true.

One thing I've heard talking to shop guys is that their spokes are proprietary and generally can't be found just laying around the back of a mechanic's room. I imagine the EA90's are the same. Having never had to replace a spoke though I can't speak from experience.