I have to say that Blichmann has a very novel and beneficial solution for the home brewer. As we all see over and over no matter what size BK,MT, conical we have, we want/need bigger. Especially for the brewer that is thinking of going pro
The Blichmann 27 gallon conical is a great starter
You can then add the top section to make it into a 42 gallon conical
And if thats not enough you can add the middle section and get a 96 gallon conical.
NOTE: you will not find the middle extension on the web site.
The advantages of these are that you can disassemble them completely for cleaning and maintenance. Two sets of gaskets is a bit of a pain. But still we grew from 27 gallons to 42 and then to 96 without throwing out anything.