Standover height is irrelevant. The important measurement is the top tube (or virtual TT if sloping) length. Look at that measurement on the fit calculators and realize that they are only an estimate and you really need to get on the bike and ride it.
Fit calculators put me on a 54 (TT) cm frame. I am very uncomfortable on one that big and much prefer a 51cm TT.
Test ride!
__________________
-------
Some sort of pithy irrelevant one-liner should go here.