My friend has John Odgen's recording of Kaikhosru Shapurji Sorabji's Opus Clavicembalisticum (what a name...), and I begged him to borrow it, since I've been curious as to what this piece sounds like, even though I've heard the only two recordings of it, Geoffrey Douglas Madge's, and John Ogdon's, are pretty much terrible. So I put the first disc in (there are four in total...) and I couldn't continue listening after about 45 minutes or so. I'm pretty sure it's John Odgen's playing and interpretation that makes this piece sound horrendous, as I've heard this is composition is gorgeous, despite it being practically the most difficult piece for piano. And I have a feeling that Madge's would be worse, since I've heard his playing is mostly imporvised. However, I heard one pianist, Jonathan Powell, can play it well. I can't wait until he makes a recording of it, because I want to hear this piece being put to justice!
BTW, if you haven't seen the score for Opus Clavicembalisticum (OC for short) or haven't heard about it (which I'm pretty sure you have), it's technically one of the most difficult piece you can play on the piano. It's 250 pages, and it could last up to 10 hours. Sorabji includes up to 7 staves in the OC. I would imagine he couldn't fit all the notes on two staves.
Here are some pics of Opus Clavicembalisticum