I decided to buy a Mooney circa 2008, based on stats, owner input, etc, and settled on an E model for the affordability sweet spot. Drove 3.5 hours to look at a 64 with low hours, nice avionics, new paint, etc., and it looked great. I was glad I brought my checkbook, all that was left was the test flight. The airplane flew fine, but I didn't buy it based on the interior room. As a front seat passenger, I had to contort my right shoulder to get it comfortably in the aircraft and had to contort my left shoulder to keep it from interfering with the pilot. The back seat was tiny and what I would consider unusable for anything other than a pancake breakfast run. I decided that I just didn't want to do that to my passengers, either in the front seat, or the back. I am 67", 160 pounds.
A Cardinal is bigger than a 172 and 182. I've owned Cardinals since shortly after that Mooney test flight, so I've sat in 177s with pax lots of times, the largest being my 340 pound buddy, who used to fly with me a lot. I've had four men in that same 177B, ranging from 6'2" to me, the smallest, and everyone was amazed at the abundance of room, front and back. The 340 # guy owned a Glastar and it outperformed my 177B in climb, cruise, etc, but he always referred to my Cardinal as "The Cadillac". Plenty of room and a good ride.
My wife and I have owned and driven across the country in everything from an MGB to a Towncar, and we find that as we get older, big, plush, easy wins the day on road (or air) trips.