I don't think so. Unless you are very athletic and in top performance condition, you can make the combo weight (your Curve D3 + you) lighter than 3 pounds before the other Curve is available if you start biking sooner. Also, more gears doesn't mean a significantly wider gear range. Lastly, the D3 comes with rear rack AND fenders, so honestly, I see no need for the wait.


EDIT: Oh, and I forgot to mention that Dahon is always late on releases, sometimes over 6 months from the expected date.