I am contemplating buying a sedan for some highway use - 600 mile round trips a few times a month. I have a Toyota Landcruiser which rides pretty well, but I don't want to rack up a bunch of miles on the thing, plus it only gets around 15 mpg. What I was thinking about is buying maybe a 3 year old sedan that has already taken a massive depreciation it that I can rack up some miles on. I don't need car drama so a BMW or Mercedes is out of the picture. I am wondering about a Toyota Avalon or a little older Lexus LS? Nissan? Infiniti? Which are the best riding sedans out there for the littleist money?