I use a Bayou classic (40kBTU) I got on sale for $19, It has a round base that is slightly too small for a keggle so I stick two 2' pieces of rebar in the slots around the edge for stability. It works great
You may not want that specific one based on price and maybe other factors, but I like a 20PSI burner for 10-gallon batches - the 10PSI (55KBTU) burners like the SQ14 will work, but it will take longer to heat things.
I think it is too much, but I haven't tried to boil a 10gal batch on my old system. It has trouble getting a 5gal to a boil and it is less than 55KBTU. If it makes the job easier it will be money well spent.