I have a thermarest self inflating mat, and a klymit static V blow up mat.
I'm 5' 11" 180 and a side sleeper. I was advised to get the thicker thermarest, because I am a side sleeper, and primarily a car camper. I agree with StagMoose, that they are not the most comfortable on the planet. However, should they get a hole, they'ii still give some comfort, and some insulation.
I bought a Klymit for my grandson, and when I found out it was on sale, I bought two. They really fold up small for back-packing. Certainly compared to the self inflating therma-rest.
I never liked blow up mats, they were too stiff and bouncy, and then I'd sweat on top of them.
By accident, I discovered my mistake.
I blew up my Klymit, and decided to let some air out of it while lying on it. I found that I could lie on my side, and still have support. It was MUCH more comfortable, when the air pressure was adjusted to my body.
I'm a muush, and if I am staying a few nights, I might bring my lounge chair 3 inch foam cushion,
On a back-packing trip, I'd bring an inflatable, like the klymit. I can't recommend one brand over another. Sorry I just don't have enough experience with a variety of equipment.