I used a Banjo Burner for my first 35 batches, but my lovely wife bought me a Blichmann Top Tier for my birthday and I have done 5 batches on that so far.
I was shocked by the performance of the Blichmann burners over the Banjo Burner, mostly because the cast burner portion looks identical. However, my Blichmann burners heat up my liquids much faster, and consume less propane. I'm at a loss to explain why this is, but I'm loving it. Not sure if it has anything to do with the Top Tier column itself, or perhaps there is a difference in the distance between the flame and the kettle.