I was at the dealer trying on boots this weekend and made the mistake of trying on the SMX Plus and it is sooo damn comfy! They did not have the SMX 5 so I wanted to know how it compares and if its the same (sizing)? Still torn on which one I am going to go with. Also, which would you go with, the standard boot or the vented version? Is there enough ventilation in the normal boot? Thanks for your input.