I have used an MSR XGK on one thru hike of the AT, a whisperlite on another hike of the AT, and a pocket rocket on the PCT. I prefer the pocket rocket. It runs better, never messes up, is lighter, etc. The only problem is that it tends to poke holes in things if you are not careful how you pack it. I worried that getting fuel would be tough but it was not. All the gear stores seem to have it. Of course, you can go lighter … but I manage to keep my pack under 20 lbs most of the time even with the rocket.
Old Man