I am not new to cycling. But - again - Cannondale did not publish stack and reach data for my 2007 Synapse (or at least I am unable to find it for that vintage). Nor did the LBS who sold me that frame even talk about stack or reach, much less measure them for me. Moreover, that frame didn't exactly fit me like a glove which is why I sized up on the Cervelo.
And, yes, the inseam posted is a proper inseam measurement. All values measured 3x with a friend.
Unfortunately, there's a fairly good difference between a 58 and a 61. I'm in-between sizes it would seem.