Originally Posted by
camhabib
I was told this once back in the day, whether or not it's still true I don't know: If you're between sizes, go smaller. It's lighter and stiffer.
I am respectfully of the other belief - that larger frame (which will typically have a taller headset) will be a little more comfortable. Though with the myriad of handlebar shapes/designs it's not as critical.
BTW it might take you 1000miles to determine based on your current flexibility.