Money no object ? Rolls Royce Phantom. Although, just what defines "best" is open to too many variables to be defineable, I think. Still, the new Phantom pushes lots of my buttons - but not all of them; no single car ever could. I would have to add : Lotus 7, TVR Cerbera or Chimaera, Land Rover SWB V8, Shelby Mustang, Citroen DS 23 Pallas, Pontiac GTO, Aston Martin Lagonda, (yes, that one), Aston Martin DB5, GT 40, Alfa Romeo SZ, Alfa Romeo 8C, E-type, Jag Mk X, Jag XJ-13................plus too many others.