In the past, I have stated that I have tried everything. I was wrong, because now I have tried everything: Huarache sandals, Vibram Five Fingers, Feelmax, Duct Tape wrapped around forefoot...
In all my trials, I have come to the conclusion that nothing compares to Asics Tai Chi's with socks.
I have found the Tai Chi's to be quite true to size. I also recommend wearing socks with them if you are not as dogmatic about no-socks as some folks. My feet just don't overheat in them. They sweat more in Vibrams.