I tested the 4.5 a few months ago before bashing my body into the pavement. Now that I'm just about back to riding, the 4.5 may no longer be available/sold out in our area so I was thinking the 4.3 (which some day I could upgrade to Ultegra if need be). What design change was made for the '14's? Maybe I'd be better off with a 2014 4.3 over a 2013 4.5 all things being approximately equal?