2007 Ford Mustang GT Premium 2dr Coupe (4.6L 8cyl 5M)
My 1997 Lincoln Town Car with just under 200,000 miles has the same engine as our new "used" 2007 GT. The Lincoln is infinitely better than my wife's 1998 Cadillac de Ville d'Elegance with barely 104,000. The Cadillac is up for sale and good ridance too. Again my 57 year old wife drives like she did our 75 Corvette.
Front-Back weight ratio, fun factor even for old foogies, quality of switch gear, solidness when you shut the door, engineer features (windows power down to ease door closure), etc.
Get rid of the "live" rear axle, offer selection of differential ratios for both automatic and standard, raise windsheld height about one inch while narrowing rear quarter pilars.