I rebuilt my vintage bike collection around European countries. One per (exception for Italy), with no regard to decade, just a good tubeset - and fit for my body.
Whatever you choose - have fun.
And remember, bike collecting for bike riders is a never ending process. N+1.
edit: ooops, fell in love with AustroDaimler and found a VentNoir to go with an Olympian. And a large step-thru for a long-think project.
also: I'm w/
RobbieTunes = I have no idea what BEST means. And whenever I think I do know the meaning, I'm usually wrong.