I feel that way about my bike--and because it's steel I do worry about rust--but I'm starting to get over it a bit. I went on a ride recently after a good, soaking rain. The streets were still pretty wet, but we were intent on fitting a ride in between storms. Needless to say, my bike was covered in ick by the time I got home. I gave her a good cleaning immediately. Although I hated to get her so dirty, it was liberating in a way, too.

One of the people I rode with that day has a beautiful Colnago. I know she hasn't taken the time to clean her since that ride, and it's killing me! I feel like taking her home myself and giving her some TLC. It's one thing to ride in gunk and it's another to neglect your bike afterwards. Shame, shame!

Perhaps you could use your other bike as a dedicated rain/bad weather bike so that you don't have to worry as much about the Pro.