I vouch for Mandy. Brahms was very exacting with his proofreading and Eusebius, Brahms student and friend, had the benefit of Brahms handwritten corrections on the first editions.
Let me check my score of the concertos, though, to make sure they are Mandyzcewsky's too. For some reason I have in my head they are Sauer's, which is not bad (same as Peters).
In the meantime, you can get number one at pianostreet for free.