I just got my girlfriend a used Eros Donna today - she's an italian herself so it won out in the end over a Felt and a Trek.
qtguard, there isn't really an answer to which is better, truth be told. There's obviously a lot fewer Bianchi's on the road than Treks, so the latter has a little less mystique, that's all. Both make very sweet bikes, get the one that turns your crank.