
Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.
Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.
I think the REI dream sleeper is basically as comfortable as my bed at home.
The rei brand self inflating also comes in an xl which gives you plenty of space to roll around and it has kept me nice and toasty in 20 degree weather - packed down its like the size of a child’s camp chair - so not huge but not tiny either. I would go for that if space isn’t a huge concern. It also routinely goes on sale and is always in stock. It also works with their cot so it gives you the option to switch if you ever want to
Hybrid foam/air pads like Exped mega mat or REI camp dreamer are the most comfortable and packable for couples IMO. I’m sure there are other brands too that are similar. Problem with air mattresses is it feels like a waterbed if one person tosses. Cots are big and bulky and I don’t know of any 2 person versions.
At 50, only pad I find comfortable is an REI Dream mattress. I've done way more car camping than before since getting it. That said, I don't hate my Neotherm but I have learned I can not sleep on my side when using it or any other thin pad. I must sleep on my back and tummy. Might jusy need to change your sleeping habits.
REI makes their own knock off of those mats. I have two and have had them for about five years with no problems. They’re called the Camp Dreamer.
For car camping (which we generally always do in mild summer weather), my wife and I use a double size REI Camp Dreamer (comparable to the megamat) and we zip together regular old Coleman rectangular sleeping bags that I got at Costco. When backpacking, we use completely different gear.

Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

Exped
Ultra Series
Lightweight side-sleeper comfort, but a bit pricey and bulky.

NEMO
Tensor Series
Ultralight side-sleeper comfort, but slippery and prone to leaks.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with side rails, but heavy and warmth claims disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable, good service, but heavy and bulky for backpacking.

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Therm-a-Rest - NeoAir Xtherm Series