Brian and Doc are right on the money. Pretty much any Buick, or 3800-powered GM car. Cheap, reliable, practical. I've owned three W-bodies (two GTPs and a Regal GS) with the L67 (supercharged 3800) and they were awesome daily drivers. Much more comfortable and more power than any Civic or Corolla.
If you want something even bigger, I'd recommend an LT1 B-body (Caprice, Roadmaster, etc) or a 4.6L Crown Vic/Grand Marquis/Town Car.