I've heard some people complain about the Reynolds (I was ready to get a set), the reviews on RoadBikeReview are so-so, some people appear to have no issues, while others have had nothing but problems. I've also seen comments here that the rims aren't all that strong, I have no personal experience with them though. In the end, the negative reviews/comments were enough to steer me away from them.

What's the price difference between the EA50 SL, and the EA70s? The EA50 SL has fewer spokes (and a cheaper hub according to easton's site), perhaps the EA70 would be more durable but i'm not sure. While i'm a fan of Easton, i've read elsewhere that having them trued or repaired locally could void the warranty. Also if you're looking at Easton, Performance has an okay deal on older model EA90 SLXs, although the rims are shallower than anything else on your list.

I haven't looked at the Revolution wheels until now, but at that price, i'd suspect Psimet could build something similar with Sapim CX Rays, Kinlin XR-300s, and whatever hub they're using (Is it safe to say that almost all Niobium 30mm rims are probably XR-300s?!?).

Taking price into consideration, and using your list, i'd probably go for the EA50 SLs if you're getting them at a good price. If you are they would be close to half the price of the others there, if you trash them you can buy another set, and you're already getting a decent set of race-day wheels from Psimet anyway.