16's won't upset
the car, as this was the standard fitment on Veloces.
You'll get a slightly better ride, and maybe the car will feel a bit
softer in terms of handling, but imo, on todays road conditions this is perhaps a tad more preferable....
there should be a good choice of wheels available, stick with those off a 147 or 156 and you won't go wrong.
GTV's will fit but there are offset issues, again imo better to stick with those that came as original fitment for the model.
Don't discount the 16"/17" Selespeed(Sport) or 17" Supersports if you find a decent set, as these make a very stylish alternative.
I'm more than happy with my standard 16" Teles