My favorite recording of the piece is by Pierre-Laurent Aimard, with Marc-André Hamelin, Stephen Hough and Glenn Gould as runners up. It's such a great piece. I should consider playing this sometime.
All I have is the Hamelin concert that was posted on DASDC (which I was fortunate enough to see live), and a LP of Gould playing it. I'm sure Aimard does the piece great justice also. I should get around to getting that. On a side note, I haven't purchased the score yet. I did see that there's a new Henle edition of the Sonata, but is it to be trusted? Henle usually does a good job of screwing up whatever they're doing. Should I just stick to the universal edition?
But in my opinion the best recording by far was by Peter Hill and is on the Naxos label.
I went there for my freshman year as well, but then transferred to the Glenn Gould School. I was studying with Kent McWilliams, a former student of my current teacher, Marc Durand, but I knew both Atzinger and Owens. I guess Atzinger just did really well in 2 competitions, so it will be interesting to watch his career.