bottleneck said:
Hi Nick,
I only have a small number of classical albums, which is why they are varied.
I take it that the sibelius symphonies are the Bach symphonies?
Sorry if I've caused confusion; no, Sibelius is a more modern Finnish composer, very different from Beethoven and even more so from Bach! Perhaps I should have put my Lilburn suggestion in a separate post. If I were you, I'd leave him (Lilburn) awhile yet. I'd say that his music is probably for those who have heard, and like, a lot of 20th century works.
Back to Beethoven. If you like him, apart from hearing more of his music (especially the Fifth Piano Concerto, known as the "Emperor") why not try working both backwards and forwards in time from him? This might require a bit of research to put him in a musical historical context, but doing that research is likely to add greatly to your appreciation and enjoyment of the music (it's amazing how learned you eventually become just by reading CD booklet notes!).
I would concur with others in suggesting that you are likely to enjoy the symphonies of Schubert (especially numbers 5 and 8), who is the next great composer on the timeline going forwards... and at least some of the music of Mozart, who I would offer as Beethoven's greatest immediate predecessor: you might well enjoy his Clarinet Concerto and Sinfonia Concertante for violin, viola and orchestra.
Assuming that you are in Britain, bottleneck, you probably have a reasonably local library which lends CDs, so that you can find out what you like without spending money. They should certainly have most of the works mentioned so far in this thread.