One more point Susan, in your original post you commented the the FIT would be identical with either design, but ask about the *handling* and TCO. Fit just describes your contact points on the bike, basically the points where your bottom, feet and hands contact the bike. You can keep that constant on bikes with many diff geometries (using diff. stems, etc), but the bikes will not always handle or perform the same. On some, you may even have pain if your body is not well balanced. I assune with a custom build both designs that are being proposed will have you balanced, but you need to understand if the only difference will be TCO w the 700c, or there will also be compromises that effect handling.