Deb,
at 5'7" and 32" inseam, I'm trrying to understand why you would need wheels smaller than 700 to avoid toeoverlap.
I'm 5'5", inseam 30", shoe size 9. On my Rivendell 54cm w/700 wheels, I seldom if ever get toe overlap- it's just not a problem.
Is the issue for you because your top tube is going to be shortened to accomodate your "women's reach"? Is it because this is going to be a WSD?