I use a couple of the style Badrock listed, but they are really loud when going "full bore", you might want to concider this other style from the same website:http://bayouclassicdepot.com/bg12_cast_iron_burner.htm
This is much quieter than the "Hurricane" style. The good thing about either style is that they are cheap, so if you aren't totally happy with the ones you purchase, you can try others.
I use the same as Otterbrew on my system and they work great for me. By the time the HLT and mash has reached temp, I have weighed and milled the grains with little time wasted waiting for heating. As I'm sparging, I am heating the collected wort, so by the time I am done there isn't much time before the boil temps are reached. On the boil, I run the burner at 1/2 to 1/4 output, so I don't believe a higher output burner would be necessary. In addition, these burners spread out the heat a bit more than the jet burner and are much quieter.
just my 2 cents.