Nemo Tensor insulated is great. I also figured out after several uses that filling about 80% makes it much more comfortable as it lets me “sink in” instead of it being firm and I roll off.
I have two XLites, an UberLite, an XTherm (all 25" wide)....just got a BA Rapide (also 25") for xmas, and gotta say it is so much more comfortable that I - an avowed ultraligher - am going to carry the extra ounces for the good night's sleep.
I’ve got the Nemo tensor insulated and put an old school closed cell thermorest underneath it. If I don’t feel like taking the entire thermorest, I just take the 4 panels I cut off to make a sitting mat and put it underneath my shoulders.
I have been using an Exped Downmat Winterlite the last 7-8 years and it had been the most comfortable for me as a back and side sleeper. This year I purchased the updated Xtherm in the long rectangular shape and I was pleasantly surprised that it was more comfortable and warmer than the Exped I had been using. Give the new Thermarest XTherm a look.
I also have the Klymit Static V Luxe for truck camping as I'm cheap...pretty darn comfy once I learned to not fill it up completely tight with air. Like the above poster, about 75-80% is great. Downside is it takes 30+ breaths...