You've got a theme going with the fabrics - Italy and wine. I'd cut strips for sashing and frame each square....either in grape (purple), the nice medium green that is in most of the blocks, or black (for drama). It would be beautiful. Then I'd do the borders in a lighter color (maybe 2" wide) and the outer one wider (maybe 4" wide) in darker. You could quilt names of wines in the outer border, or Italian words that describe wines (or grape names), etc, in a contrasting color so it shows up well. It would be a gorgeous quilt.