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

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Sea-to-Summit Comfort Plus Insulated. It is a dual-chamber sleeping pad, so you can tune the bottom chamber to provide protection from the ground and top chamber to give you the right level of cushion. None of the other pads on the market can do this, including celebrated Therm-a-Rest and Exped offerings. Exped Megamat is still more comfortable, but it won't fit inside a kayak and weights a lot more. S2S Comfort Plus is the next best thing.
Check out the Sea to Summit Comfort Plus XL - it's literally designed for bigger folks. The dual air chambers prevent you from bottoming out when side sleeping (i'm also a side sleeper at 260lbs). Usually around $199 but goes on sale sometimes and packs down surprisingly small.
I'm pretty much exactly like you. Tried and DONT LIKE: Therm-a-Rest NeoAir Topo Luxe. It's thick! But the horizontal baffles suck for side sleepers. Sea to Summit Comfort Plus Insulated. Not thick enough. Hip pain. Noisy. The one I want to try next: Therm-a-Rest NeoLoft.
I have the non-ul version of that StS pad and I love it more than any other pad I’ve used in the last 20 years…
3season tent; sea to summit traveller down sleeping bag, el cheapo down quilt & sea to summit insulated inflatable mattress. The sea to summit sleeping bag is rectangular & has a full zip so u can use it as a doona. This combo works in a large range of temperatures.The down sleeping bag & quilt pack down very small.
A quality sleeping pad. For family camping or long term camping, we've got an exped MegaMat duo. And for solo camping I've got a sea to summit insulated inflatable camp pad. The key thing I've learned is I need to keep them a little under full inflation. That provides the best night's sleep. This has made a huge difference and isn't as bulky as the cot. MegaMat is probably close tho. But all of the pads also work for winter camping, something I do annually. camp pad is unbelievably important. Nothing impacts my camping experience as much as a quality camp pad.

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