I am trying to decide between these shoes for my next marathon. I have previously run 4 marathons in lunaracers, but the most recent version completely tore up my feet when I wore them with no socks (had no issues with version 1 or 2). So now I am either going to get a new pair of lunaracers and wear socks, or buy a pair of one of the other models and start breaking them in. Does anyone with experience in the shoes mentioned above have any insight to offer? Any help would be greatly appreciated.