Welcome to the forums and the C&V community.
The Bianchi is an '88 frameset most likely a Campione de Italia, the Formula Two tubing frames were used across a lot of models, But the Ofmega HS sort of narrows it down. Nothing seems to be original except the HS and maybe the seatpost. This frame came in a 56 then a 59 so be careful of the sizing. The older steel Bianchis were measured center BB shell to top of the seatpost. This may be a 59 so alittle on the tall side compared to the other bikes.
Of the three, Centurion, Panosonic and Bianchi it will likely be the best rider, thos Formula Two frames ride pretty good. That Centurian is a pretty popular bike, but it looks small compared to the Panosonic.
