I have a sea to summit ultralight insulates large pad 25x78x2 with a 3.1 r value. 17oz pad only, 23 oz with stuff/pump sack and repair kit. It’s been slept on one night. New is $160. I’ll sell for $100 shipped. Text for more pics. 541-640-2200
Look up Klymit on eBay and get one of their factory refurbished pads for about half of full price. I have three of their pads and love them. One had a leaky valve and they exchanged it no questions asked. All of their stuff has lifetime guarantee including refurbs, I believe.
Klymit stuff also comes up regularly on Camofire. They make pillows, sitting pads, sleeping bags, tents, etc. I have no affiliation with Klymit, just a satisfied customer.
I'm a side sleeper, I've purchased a few Klymit pads and hated them. I have a exped megalite xw pad I really like, but its huge, I also have a big agnes slx I really like thats way lighter.