HRE, if you have a food scale or something else to measure the weights of those shoes with, I'd appreciate hearing how much those Ultimate 81's weigh. I'm a bit anti-shoe, but if I want to put in any type of mileage I pretty much have to wear them right now. The Tiger Tai-Chi's looked like they'd be super-light, but nobody has them in stock, apparently because they are related to some movie where Uma Thurman wore them...pretty crazy. Right now I do pavement running in the NB831's and offroad stuff in Cubato's, but I'm ultimately wanting to race barefoot so if the Ultimate 81's have less shoe to them than the Cubato's it could help with my transition.