Incidentally I think you use the same specs as Bennati. I wonder if Cannondale has some spare frames. I remember he used a top tube in the 58 cm range, seat tube I think was 52 or 54 cm, I think it was 52.
Another note, the 75.5 seat tube angle makes the top tube longer than its length because my saddle's "neutral" position is pretty far forward. My saddle-bar length is almost the same as a teammate's 63 cm BMC bike.
__________________
"...during the Lance years, being fit became the No. 1 thing. Totally the only thing. It’s a big part of what we do, but fitness is not the only thing. There’s skills, there’s tactics … there’s all kinds of stuff..." Tim Johnson