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The Ralph Sauer arrangements, available through Cherry Classics, are great.

I'm sure you know about these already. I've got them both and go through them regularly...

Bobo/Bixby: Bach for Tuba (two volumes). Various Bach pieces, mostly excerpted. Not complete Bach Cello Suites, but still good material. Wide range of difficulty.

Robert King: Six Short Solo Suites for Bass Tuba. These are excerpted exclusively from the Bach Cello Suites. It is not a complete arrangement of the Bach Cello Suites. It's a nice book to use when you want to play just a little bit of Bach. There is a range of difficultly in these books, but I'd rate it overall as "easier" than the Bobo book.

Get the Sauer arrangements if you're interested in a complete Bach Cello Suites set arranged for tuba. Good stuff.

I agree with the Sauer transcriptions.

Doug Yeo has some excellent transcriptions on his website http://www.yeodoug.com/publications/pdf/pdf.html

I prefer to play these at pitch, so I prefer the Mark Lusk version for trombone (this is sans phrasing). Feel free to play down an octave.

If you want to study and understand why there are different versions, I highly recommend the Barenreiter Urtext version (blue) with the original facsimiles of the derivative sources.

I have the Peter's Edition, which is, I suppose, supposed to be the (an?) original. But I'm with Bloke, I spend more time playing music and less time trying to be a Baroque scholar getting one of the edited versions. The octave transcription is no issue for me, but the original doesn't have much guidance on ornamentation, interpretation of double stops, tempos, phrasing, and such. Given that I'm an engineer and didn't study this stuff in college, I'm paying attention to recommendations for edited versions.

Rick "reserving the right to disagree with editing, of course" Denney