SOTT usually gets the honour being the "magnum opus", for me that title should go to Parade (or even 1999).

Parade is amazing though - each track is individual, but the whole thing hangs together perfectly, it sounds complete. I personally find it much more interesting that SOTT, which I don't often return to a lot, as an album, though individual songs are of course superb.

I'm the kinda person that likes to see the sketches rather than the finished painting though - so Parade over SOTT and Controversy over 1999.