Hi. Thank you for replying. So far I've found a Liszt collection with the sonata, some Etudes de Concert, Etudes d'Execution Transcendante and Hungarian Rhapsodies. I've only listened to the sonata, I'll check out the other pieces later.
Listening to the sonata was an odd experience. My first impression is that he indeed has a good sound, which is rare among piano players. He obviously has a sense of phrasing, but I was unsatisfied with the way he interpreted the music. It was jerky and very formal. It made me feel like this kind of rhapsody-like music is not his thing, but I think drawing conclusions this quickly would be a mistake. I'll try to find more recordings.
T