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

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A Katabatic quilt and the Rei Flash 55 would be next to pick up. You won’t need the switchback much, the Neoloft is plenty warm and durable.
You mean backpacking? The Megamat ultra is my favorite comfort oriented pad that you can use backpacking but it’s pretty bulky, but for shorter distances or more base camp oriented backpacking trips it’s fine. The Thermarest Neoloft packs smaller while still being very comfortable so that’s a nice compromise. If you are pushing miles, the Rapide SL, Nemo Eclipse, Exped Ultra 6.5 are really good.
I’ll second the XR. It’s pretty comfy for stomach/side sleeping. But also, I tried out the NeoLoft at REI this weekend and holy crap is it a comfy cradle of air.
This is what I use!! Definitely worth the extra weight and little bit of time it takes to inflate. I sleep like I'm in my own bed
The Ultralight is certainly lighter, and a comfy pad compared to a lot on the market, but the Flex Air is on par with Thermarest Neoloft and Exped Megamat Ultra, except lighter and less balloon-like compared to the Neoloft.
I second the NeoLoft. 8 nights kayaking on the Rideau canal and more comfortable than any pad I've tried before.

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