I'm an avid gal cyclist who loves the challenge of an occasional 200 mile ride but rides more consistently between 60-100 miles in one ride. I am 5' 3", currently own a bike with 700c wheels, am looking into buying a new and possibly custom fit bike and am confused as to which rims I should get. I do just fine with the 700c wheels and as for my toes hitting the wheel during sharp turns, I haven't had a problem yet. I have spoken with one frame builder and he seems quite adament about putting me on a bike with 650c rims. Do I want this?