Thanks for the advice everyone. I think I'm going to check it out. I love art and art history, so perhaps it is a no brainer for me. Like Kent said, it might be easy to take it for granted in the wake of later works like the Sistine Chapel and so forth... For me, I will be looking at it in the context of when it was done. And I think (or at least I HOPE) I will be able to feel that same sense of wonder.
Also, there really is a 15 minute version of the train from Venice to Padua, according to Rail Europe and some other sites. It must be the fast train. It's a little more expensive, but it apparently takes 15 minutes, while others take 30-40.