Italy for the New Year

Hey everyone. I'm going to be spending the New Year in Rome then making my way up to Venice for my flight out. I'm not very worried about the beginning and end, but the MIDDLE! All in all, we'll be spending 4 days making our way to Venice. We will be doing 2 days in the Tuscan countryside with an overnight stop in Siena. Also, 2 nights in Bologna with a day trip to Parma.

Here's what I need to know...

Best food recommendations between Rome and Siena
...between Siena and Bologna
...between Bologna and Venice

It can be off the beaten path, but don't want to stray to far considering our tight schedule. Following the map, here are some towns along the road, Rome to Bologna...

Orvieto
Sinalunga
Monteriggioni
Colle di Val d'Elsa
Poggibonsi
San Casciano
Firenze
Barberino di Mugello

Bologna to Venice...

Ferrara
Ochiobello
Rovigo
Monselice
Padua
Mestre

Obviously I can't stop @ each one, but I figured this would help me filter a few places out.

Thanks!!