Just got done listening to all three in full. There are things that I liked about all of them. Overall, I feel Barenboim has the most holistic, consistent, and integrated approach, taking into account the characteristics of the piano/instrument itself and that tied with general musical characteristics, the style of writing in general, his knowledge of the specific piece and of Beethoven's music, and then his own personality. With the other two, even though there were things that I liked (sometimes a lot), overall I felt that some part of the "equation" was almost always out of balance.