Heath, do try the 25 inch width in a pad with vertical baffles (not the horizontal baffles like the NeoAir) to see if it will work for you. I found with the NeoAir that every time I got within a couple inches of the edge, I inevitably rolled off (actually, every time I turned over, which I do frequently). This won't be true with horizontal baffles, especially on those pads that have the outside baffles slightly larger than the inner. Your mileage, of course, may vary. IMHO, it's worth a try!

Since overnight temps can easily get down to 20*F in the high elevations of the Rockies, I want a pad with an R value of close to 5 for places like the Wind Rivers. Of course all of us differ in how warm or cold we sleep, so this is a YMMV (Your Mileage May Vary) thing. I'm a cold sleeper, myself, so I need more insulation than most.