I like the O’Conor Beethoven sonatas, too. I also like a newer set by András Schiff on ECM. It’s been a while since I listened to them, but as I recall, the sound is typical ECM (slightly more beautiful than reality), and the performances reasonably energetic but not heart-on-sleeve. I would recommend anyone interested in this music give that set try -- it should be easy via Tidal, Qobuz, or even YouTube to see if you like them.
P.S. Jed Distler said this, on Classics Today: " In sum, Schiff’s Beethoven interpretations may not suit all tastes, yet they invariably hold your attention, challenge your assumptions, and compel you to listen with fresh ears."