I have recently upgraded most of my decades-old backpacking gear and am happy with most of my choices so far, including TarpTent Notch and Gossamear Gear Mariposa pack. I still have a heavy full-length Thermarest and am looking for a lighter but still comfortable option, and am confounded by all the products out there. Among the choices I'm looking at are the Thermarest NeoAir XLite, the new Gossamer Gear Airbeam Sleeper (GG recommends a Thinlight foam pad beneath), new Multimat Superlite Air, Klymit Inertia O Zone or other Klymit Inertia model, Synmat UL 7, REI Flash Insulated Air, Mammut Alpine foam mat, and Big Agnes Q-Core SL or heavier Insulated Q-Core. I am a side sleeper and a light sleeper, 6'2", 180#, in my early 50s and plan to hike several hundred miles of trails a year in the coming years, spring through fall, including Colorado Trail, Benton Mackaye, John Muir, Foothills Trail and longish sections of the AT and PCT. I use a Montbell Super Spiral Down Hugger #3 bag (not recommended; despite its great cost it leaked down the first time I used it and had to be repaired). I'd appreciate any advice.