I run mutanoraptors, specifically the 2.24. Rolls nice and fast, corner extremely well. They seem to do ok in the sand, obviously with reduced grip but when they break free, they do so in a predictable way. If that makes any sense.
http://greenfishsports.com/product/...ountain-Bike-Tire-WTB-Mutano-Raptor-Race.html
http://greenfishsports.com/product/...ountain-Bike-Tire-WTB-Mutano-Raptor-Race.html