Sizing
I have a C'dale X7 I purchased July. Its a size 52, I am 5'10" with 30" inseam. It fits me perfectly.
I tried telling the bike shop I needed a size 50 and was told that it would be too small. I finally relented and let them order the 52 size, glad I did now, because the smaller frame would have been too short.
Of course the bike shop sized me when the bike arrived, they changed to a shorter,higher stem, but other than that, no other changes except for seat height. I also changed to a WTB saddle from the original.
As far as standover....when I step out of my bike , it barely touches my crotch, I don't care, its not a big issue, much more insignificant than having a bike too small. Or too large for that matter.
Sorry it didnt work out for you, since I understand you purchased another bike brand.
Nothing is worse than spending bike money on a bike and it not fitting. But you don't know for sure until you ride it for over 2 hours. Been there done that..