'88 Cadillac DeVille. i used to have one, and the seats (non-leather ones, kinda plush material) were extremely comfortable, far better than any other seats i've sat in
it had an air-ride suspension which was pretty smooth on the road as well. good value for money if you ask me.
you could grab a whole fleet of them for hte price of one Maybach or Rolls.
the one i had was around a 5L V8 (dont' remember exactly) so it had a fair amount of grunt, and it was pretty reliable overall (but with a fleet, who cares).