Cibo is a great place for nice dinner!! Compared to Bianco, Cibo has a more local and intimate vibe. Also, they have a bigger selection of pizzas and unlike Bianco, they have other traditional italian entrees (They have homemade pasta on some nights!). When I went it was busy, but we didn't have to wait for a table. The servers are dressed really casually, but a lot of the people eating were dressed up. It's kind of a casual place but if you dressed up you wouldn't feel weird.
Bianco is the place to try for pizza in Phoenix, of course, but Cibo is just as good...especially if you are looking for something other than pizza too!