I'm sorry I hadn't spotted that this thread had continued and I'm never ne to miss an opportunity to eulogise about Sorabji.
The recital Nick must have heard (or gone to? - that would be just too exciting) in the 80's must have been Ogden's momentous performance of the Opus Clavicembalisticum at the QEH which he later went on to record on the Altarus label. That recording is soon to be re-released.
As I detailed in the first post on this thread OC, which lasts about 4.5 hours is not Sorabji's longest work - there are several longer including the Organ Symphonys Nos 2 & 3 both of which last about 7 hours. The 2nd is due to recieve it's world premier soon performed by Kevin Bowyer. Equally long would be a complete performance of the 100 transcendental studies . These have almost all now been premiered and are being recorded on the BIS label the first of seven volumes is due to appear later this year.
The Altarus label champions Sorabji's music
http://www.altarusrecords.com/News.htmland have recently released a 3CD set of Jonathan Powell's performance of the 4th Sonata which comes in at a mere 2.5 hours.
Notably, within the next two weeks there will be two performances of Sorabji in the Merkin Hall New York. Donna Amato will perform the WP of the Piano Symphony No 5 (again 2.5 hours) and Jonathan Powell will play Opus Clavicembalisticum. Here's an article in the NYT http://www.nytimes.com/2004/06/13/arts/music/13GRIF.html
I was fortunate enough to hear JP play the OC last year in the Purcell Rooms. I posted my usual OTT reaction here
http://www.sibeliusmusic.com/cgi-bin//chat/chat.pl?com=thread&start=139231&groupid=1&words=Sorabji&name=carter
Of course how long a piece is, has absolutely no bearing on whether it's worth listening to. I could go on and on and on about the extraordinary qualities of Sorabji's music but I shan't - if you're interested in a totally different musical exprience which requires you to put (almost) as much effort into the listening as it does for the performer to perform it and indeed it did for the composer to write it then try it out.
My editing of the Jami Symphony continues apace and I have just completed page 435 of 812 - should be finished late 2006 and then I'll start on the virtual performance.
DC