Perfect car is difficult, I would have the style of the older cars but some of the comfort and drivability of the modern era. Some of the American car shows take the 70s muscle car and fit modern engines, suspension etc but the best I have seen was a BMW E9 3.0 CSi at Silverstone Classic that had been fitted with the 4.4 V8 from an E39 M5 and most of its running gear, it also had modern power steering, aircon and bluetooth radio fitted into a classic 70s radio shell. Looked super cool and I guess it drove well too