I would suggest instead of starting with make/model of stove, a person shopping should first start with these two questions:
1) Where will I be using it?
2) What fuel do I want to run?
The answer to question 1 will inform your answer to question 2, and that will narrow down your stove choices considerably.
1) Where will I be using it? Propane is not ideal at altitude, so if you plan to do a lot of high elevation touring, you may want to go with a different fuel source. Further, Propane and Isobutane (like the canisters Jetboil uses) are terrible in the cold; so again, if you do a lot of cold weather adventuring, it's not the best choice. If you are going out for the occasional weekend/week long trip in the US or Canada, and that's it -- I think Propane or Isobutane is ideal, with Propane getting the edge of fuel price/availability and Isobutane getting the edge on the compact size of most isobutane systems.
2) What fuel do I want to run? Once you've considered the above, you'll know what kind of fuels will work best for your intended use, and that lets you narrow it down. If you are settled on Propane, you've got lots of options but for ease of use you should know there are a multitude of adapters available so that you can run your propane stove off of the little green bottles (Expensive) or hook them up to a larger tank. If you do the occasional run and always return to home base after a few days or a week, I also recommend getting one of these:
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The adapter above will let you refill a 1lbs tank off a larger bulk tank, so you can take advantage of the space saving size of 1lb tanks without the same penalty of their expense.
We prefer keeping all of our fuels the same, so we don't need to worry about finding multiple sources of consumable fuels on a trip. That means for us, it's the capability to run unleaded gas for everything. But sometimes, you cannot beat the ease and convenience of propane/isobutane. Since this thread is about two-burner stoves, for us, that left only one choice:
Coleman 425 Series Liquid Gas Stove.
You can use Coleman liquid fuels, unleaded gas, or with the
right adapter you can run propane too!
We just picked ours up as our rig has a bit of extra space so we could upgrade to a two burner. Prior to this, we got the same functionality with the
MSR Whisperlite Universal, which will run off of white gas, unleaded gas, diesel fuel, kerosene, and isobutane. It really is an excellent stove.
(Edit: Amazon links above are not representative of the best prices; REI is often better but Amazon is easy to show off the products)
