When I replace my Civic Si, I'm looking for something a lot roomier inside, and with emphasis shifting to quiet and refined instead of overtly sporty. I've been casually looking at both the Impala and the Taurus, both of which are very handsome in my extremely subjective opinion, but then I compared the internal dimensions to the Fusion and Malibu respectively and was shocked to see that they're nearly identical size-wise inside according to the spec sheets. First, are these spec sheets misleading? Is there more usable room in full-size sedans than modern midsizers, or not? Second, are there long-term benefits to full-size sedans in terms of build quality, solidity, how they hold up over time? Can't really tell that from a ten-minute test drive. Third, anyone here owned an Impala, Taurus (the full-sizer, not the midsizer by the same name), or Charger/300 and want to share your experiences, positive or negative?