I have an old Coleman 426D 3-burner stove that works very well with a group of about 4 to 6 well. If you watch gear swaps and Craigslist, they come once in a while. A lot of river outfitters here in Colorado have (or used to have) them and mine came from a guy who was retiring from the biz. I paid $20 for the stove and a cast iron griddle that fits it. You can also watch for the 428, which is a different version of the 3-burner. The body is shorter, so it closes into a thinner package. Not as blingy as the Partner Stove, but mine's about 30 years old and lived ~25 years with a guide, so they are reliable at least.