You came HERE for help?
By the way, I really like the bike, especially fond of those wheels. You can actually get celeste decals for those...
That is a clean, solid performer, and if you like the geometry and the brand, simply look for another level up in the same size and brand.
As far as a Zunow, most of them have to come from estate sales. Those people subscribe to the "you'll have to pry my cold dead fingers...." philosophy on those, but they are out there. My guess is you can upgrade to a better Bianchi for $600-$800, but I sure wouldn't get rid of that one....