Best way to heat a 25 gallon copper pot still

[CarolinaShiner]

I'm in the process of putting together a classic copper pot still that is a cross between an upscaled version of Pints 12 gallon and a 25 gallon copper pot that Corene had built. Capacity is 25 gallon(probably run around 18 gallons at a time), it will have a 12 gallon thumper and use a 5/8 OD worm condenser. The bottom of my pot has a 20 inch diameter and is made from 48 oz copper. I'm looking to heat this bad boy with propane so I've been looking at some of the bayou classic burners. I've been trying to decide between the KAB4 and the SP40. Here is where I need some advice. Both burners put out over 200000 BTUs, however the KAB4 only has a 17 inch cooking surface which I was afraid could possibly be unsafe/unsteady for a pot with a 20 inch bottom diameter. The SP40 offer a 22 inch cooking surface but it has a double jet burner which looks to me like it could potentially unevenly heat my pot since the jets would only be concentrated in 2 small areas. Both burners are within $3 of being the same price on Amazon. Which would be my best option or could anyone recommend another burner that would heat a boiler this size efficiently that is in the same price range ($80-$100)