Personally, I am most impressed with Tamiya's auto kits. They don't have near the selection that Revell or Monogram do, but all-in-all they make a pretty dang good build-up. Some of their kits are curbside, so check carefully if you're hoping to get engine details.
Other people have different priorities when it comes to auto kits, so you might get a range of answers. Good luck...
Murray