I take it you're not a Brucknerian, Emil. He was a composer I discovered on my own... in the classic Eugen Jochum recordings:
http://ecx.images-amazon.com/images/...500_AA300_.jpg
I will admit that as a composer he is very dense... and I think the same is true of Brahms. I really struggled with his symphonies until I heard John Eliot Gardiner's recordings which are far more "transparent".
Bruckner lacks the lyricism (and neurotic angst) of Mahler, the absolute mastery of orchestration and orchestral "colors" of Richard Strauss, or the insane and emotionally overwhelming genius of Richard Wagner... and certainly he cannot rival Brahms' breadth and depth... especially his chamber music and choral works... but he surely makes a 5th among these great late Romantics... every bit the equal to Sibelius or Grieg.
Herbert von Karajan makes this quite clear:
http://www.youtube.com/watch?v=6CEiZ7DTVZ8
http://www.youtube.com/watch?v=jkfjG...feature=relmfu