I suspect this is a very hot topic for many of us. Especially those of us who get only a few short trips a year- I prefer to sleep well starting the second night out!
A decade or more ago I upgraded from a 1-3/8" standard Thermarest to to 1-7/8" LE. Unfortunately it's 27 oz. I tried the 1" thickness and they didn't work for me. I really like how my 60" LE covers my knees as well. I don't like the lack of padding under my ankle bones.
Too heavy though. I ordered a 20 ounce, 48"x 1-1/2" Pacific Outdoor Equipment AO Mtn pad from REI's sale. I can't decide whether to pick it up for a tryout or simply return it so they can resell it as new and start saving lunch money for the new NeoAir pad. 2.5" x 72" at 14 ounces sounds mighty promising.
For an occasional hiker like me the sleeping pad is one of the most critical pieces of gear for having a good time.
Of course I'm not UL. I take great pride in dropping from my "old" baseweight of 30+ to 17 last summer.

