I do a lot of backpacking and camping and for trips where weight isn't the primary concern, I use an MSR Whisperlight. It can run on nearly any fuel, work in way colder temperatures than any canister stove like a JetBoil, and is completely field repairable. I have an old one that is at least 20 years old and it still works awesomely, even after I ran it on nothing but diesel for 2 weeks. I've used it in temp as low as -20F without problems, have only never replaced a stove part. The plastic fuel pump handle is the only thing you have to be careful with as it will snap if you drop it on a rock or something. I've only broken it once, but I think you can get a metal version.
Only downside, you have to be a pro to get it to simmer, but its possible. Also, it only takes liquid fuel so, while cheaper, it can be very messy and smelly if you spill.