I assume you are brewing 5 gallon batches. If you're intending on continuing with the same volume I would recommend getting one of the standard (relatively cheap) cast "swirl" burners. They're commonly available for turkey fryers.
My recommendation is to shop around for a burner that comes with a regulator assembly with the gate valve mounted downstream from the regulator (it'll be a T-handle, as opposed to a knob). The "safety" regulators are nothing but headaches IMO.