another suggestion
Hmmm...maybe the Ramos Pinto is a drier white port - most white ports are medium sweet and I just couldn't see that pairing with the soup. In any case, Shaun, I completely missed the idea of pasta proceeding the soup and the idea of Italian wine. No prob. Another idea, then, is for an Italian Pinot Grigio (Pinot Gris) from northern Italy. That's hopefully easier to find than a white Rioja (and will also be less expensive, so that's good). It's one that also goes nicely with smoky food (I always like to pair it with smoked salmon, for example). A Pinot Gris from the Alsace of France would also work -- and northern Italy also produces some very good Chardonnays as well that would fit in with Heather's suggestion of a Chardonnay. Any of those should flow right nicely into the Chianti served with the pasta and main.
No, at least to my way of thinking, switching from white to red of the same region is nothing to be frowned upon.
good luck! Bonnie