Everyone is right, that I can tell. So, if you don't go 10-sp, here are tips.
1-The Miche hubs are very nice, but get the wheels trued/tensioned and have the hubs packed. World of difference.
2-Lube. The FD, RD, and the cables can greatly benefit from this. You will notice.
3-Same with the BB. It's a Miche, but needs to be packed/cleaned/lubed. You will notice.
4-The cassette is most likely a Miche, though mine had a Campy. The newer Miche cassettes can be found in wider ranges.
5-I believe the shifters are Mirage. They can definitely be lubed to be a little more agile.
The above 5 steps can really help to make the bike more versatile and easier to ride. I found the fit to be odd, as Bianchi used a fairly long stem on most of them. Swapping out the stem for a nice light quill and the crankset/bb for a Veloce made it a bit lighter. I found the OEM Vittoria tires just fine. It's a nice-riding bike, not a racer, and not a tourer, but very nice all-around.
I certainly agree that the upgrade to 10-sp is fairly costly, mainly because of the wheelset. However, check your ebay/CL listings, because you can easily get a Veloce 10-sp group from a place like ribble.uk, along with a set of wheels equal to the OEM's, then sell the entire 8-sp group to offset the cost. Figure $475-$550 on the group/wheels, less $200-300 on the group take-off sale, $175-$350 net increase to go 10-sp.
Now, if you had 8-sp Campy, up the lineup a bit, I'd say there would have to be a pretty good deal out there before I'd upgrade. I really like 8-sp Athena and up, paired with nice Campy wheels.