Mex, you can convert ANY camping stove to accept 20lb cylinder. So find one that you like, and convert if you have to.
One thing I noticed in a couple of stoves linked above is the absence of ignitor of any kind. Which is not a big deal, and in those that do have a mechanical ignitor it never works well. The best ignitor is battery-operated, a small part for about $15, and dumb manufacturers of RV stoves never put it there.
I don't understand the craving for more BTU. Alright, maybe it does take long when the pot is filled with crabs, but are you really in a hurry?
