Ultra 3R Mummy

Exped 3R or 5R might be worth a try. They both come in mummy wide and have vertical baffles, which some people find more comfortable. I’ve never used an xlite, but I find the 5R comfortable for side sleeping. 

A comfort-oriented side sleeping setup that has worked well for me:  - Exped Ultra 3R LW mummy fits my height and is wide where it counts. Because the baffles run lengthwise, they “block” you into the pad and you don’t feel like you’ll fall off. (At least, I don’t. I am a tall, somewhat slender woman.)  - Put a patch of foam under the hip - prevents the feeling of bottoming out. 2 panels of switchback, a cheapo sit pad, some foam that comes with a random package - anything squishy works. The foam is key. The only reason I ever felt uncomfortable before the foam was my hip hitting the ground. No longer!  I can sleep in any position in that setup. 

My exped 3r and 5r pads are great! They are very, very comfortable. Cannot speak for the Tensor. My REI doesn’t have the Exped Ultras on the floor, they’re a website item. If REI is a long drive, order from REI online and try it on your (very clean) floor for a night. REI has a no-questions-asked return policy.  For side sleeping I recommend sleeping on the pad slightly deflated and throwing a small piece of closed-cell foam under your hip.

I’d get the 3R and supplement with a CCF pad for the occasional sub freezing trips. That’s my personal setup.

As far as $/warmth ratio, this one is the winner. $50+ cheaper than S2S, Therma, Nemo and really comfy. I love mine.

The 3R is a pretty incredibly value for an 18oz pad at around $150. The 5R is probably better for being in Maine outside of summer.

I got an Exped Ultra 3R for like $60 on r/ULgeartrade. Try this sub and FB Marketplace/Craigslist.

This is what I use and love it.

6'1, 260 lb side sleeper.... Exped Ultra 3R is my pad of choice for my climate, but they have some with much higher R-values. It's more comfortable, to me, than either the Nemo Tensor or Thermarest X-Lite.

I was that way until I found the right sleeping pad and pillow situation. I'm using an Exped Ultra 3R and an Exped mega pillow. It's amazing.

I only have experiences with the Exped Ultra 3R. I used it for a 60 day tour in Scandinavia and it worked great, slept almost better than at home.

This is the pad that finally let me sleep

I second this take on the Exped Ultra 3R. It's my main pad, and while I've taken it down to 25° F ≈ -4° C, I'd rather have a warmer pad when the temperature drops below 30° F ≈ -1° C.