I am searching for a vintage road bike since the loan on my current bike is nearing an end.

Does anyone have advice on a typical, good, vintage road bike I might search for. I mainly use the bike to commute but I have taken place in a 100 mile ride and several 60/70 mile rides so I need something that would be useful for the periodic long ride.

Today I found a Cannondale Black Lighting (1989) for around $350, a Fuji Allegro (1986) for $200, and an older Bianchi (80s) for $300.

The Cannondale and Fuji are mostly all original. The Bianchi seems to only have the original frame (Columbus tubing) with mainly upgraded components.

Just from the make and model does anyone have any advice regarding the overall quality of these models during these time periods?
Or in general a good vintage bike make to keep and eye out for?

Thanks.