Vanguard, mainly because I like classics. Also, it's a bit hard to compare a non-driving 'classic' to a driving 'post-classic'.
I had to repair a Chase HQ for someone and played it through the game completely with about 5 quarter inserts to continue game to the end. I don't know what the settings were on (easy vs hard?), but it had about as much fun as Turbo did (which was limited). I'd pick Pole Position for a classic driver, and perhaps OutRun or Top-Speed as a post-classic, and one of the hard drive driving games as a 'new' driver.