The 19" 88 tip jet burner has the highest BTU output of any burner that I've seen, but unless you're running a 3bbl system it wouldn't make any sense to use for brewing.
Besides coming to a boil fast, what are you looking for in a burner? Are you looking for just a burner to mount in a brew sculpture, or something with a stand incorporated? Do you want to option to be able to convert to natural gas? Will you ever want to automate the burner? What size batches will you be brewing?
I think the 10" banjo/hurricane/BG-14 style burner is one of the better options out there. They can put out over 200k btu (more than a homebrewer should ever need), are easily adjustable even at low flame levels, run very quiet, are relatively efficient, and can be run on low pressure propane, high pressure propane, or natural gas.
The best BTU for your buck is probably the SP-10/BG-10 style burner, but it's loud, less efficient than some others, and can only be run on high pressure propane.