One night near Union Station...
I will be in town one night, staying near Union Station, before a train trip across the country to San Fran. I would love a good Italian place, either neighborhood/family joint or more upscale. I don't mind traveling though in the area would be excellent. Thanks so much.
Depending on how far you're willing to travel...
Best Italian restaurant within a 0.4 mile walk of Union Station: The Florentine - www.the-florentine.net
Best Italian restaurant within a 0.6 mile walk of Union Station: Vivere - www.vivere-chicago.com (on the ground floor of the Italian Village complex)
Best Italian restaurant within a 1.1-mile walk of Union Station: Piccolo Sogno - www.piccolosognochicago.com
Best (and only) fine-dining Italian restaurant in Chicago: Spiaggia - www.spiaggiarestaurant.com (opens next week after re-modeling, 2.2 miles from Union Station)
Best Italian restaurant in Chicago IMHO (and moderately priced, too): Anteprima - www.anteprimachicago.net (in the Andersonville neighborhood, 7 miles north of Union Station)
All of these are excellent; quality differences are really quite subtle and of course purely a matter of opinion. You can get a great dinner at any of them!