
Exped
MegaMat Series
Car camping comfort king; warm and durable.
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Yeah I have an older Tensor insulated that is 3 inches thick, 4.2 r value, and 20oz, and it also cost around $190 at the time. This Eclipse is just better in every way and doesn't cost more, assuming durability is the same. When my Tensor wears out maybe I'll snag this.
I have an insulated Tensor (previous model) that I love. Also have a couple others that are fine. Setting up in a good spot (the slight slant on my last trip was brutal on my back) helps, and though I'm small, I find the cost/weight of the wide version to be worthwhile.
I would also pick an emo. I have one of the tensors, I think the insulated one so I can use it in snow. It's pretty comfy. I think I found another one of those (or very similar sleeping pad) at the resale section of REI, and ended up having to repair a half inch gas, but some sealant and tape over it, and it's held up fine. So OP, if you want cheap but good, consider if you're willing to repair gear that other people are getting rid of because of repairable damage.
Besides the pad (I have a Nemo), consider putting whatever extra cloth-like material you've got into a stuff sack (I often use the one for the tent, but sometimes just roll things in a fleece) and put it between the knees.
I don’t think anyone else has mentioned this, but if you’re an REI member there are periodic 20% off coupons for full-price items. If you don’t need this right away that might be something to consider. Thermarest also just updated the XTherm and the previous version has been available at a steep discount. I got one for 40% off earlier this month at REI. I think they’re now sold out of them but there’s a chance you could find a deal at another retailer. Have not had a chance to try mine in the field yet but looking forward to it. I have one of the three-season, older versions of the Nemo Tensor and that’s a great pad, too. I also like the Exped Ultra line for backpacking pads.
I have used the Tensor Insulated RW (predecessor of the All Season) and (older generation) X-Lite mummy extensively, and I sleep equally well on both. Therefore, I prefer the X-Lite for it’s lower weight.
I have the NEMO (previous generation) in wide, got on a closeout sale around $90-100 from REI. Works great for me as a 230# side sleeper.
The new Nemo Eclipse is supposedly more comfortable, cheaper, likely more durable than all of those with only a 2 oz weight penalty against the Tensor while still being lighter than the Ether Light and Rapide. My wife has the Rapide and I have the previous gen Tensor. I'd say the Rapide is slightly more comfortable, but is heavier, doesn't sleep as warm and packs down larger than the Tensor. I decided to give the Eclipse a shot and ordered one from REI this morning.

Exped
MegaMat Series
Car camping comfort king; warm and durable.

NEMO
Tensor Series
Lightweight side sleeper favorite, but polarizing on warmth and noise.

Exped
Ultra Series
Comfortable, quiet side sleeper pad; compact for backpacking.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with unique side rails; R-value and durability disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable; a bit 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