recommendations for effective/afordable propane burner?

[davebstock]

I am shopping for 2 burners for all grain brewing. Will stick to 5 gallon batches, possibly doing 10 gallon with same burner. Will upgrade if system if I decide to brew bigger. Looking for a self standing unit.

 

[davebstock]

I will be using them for sparge water and a brew pot. Doing a water cooler mash/water tun.