Name a tune that.............

OK peeps we're coming to the end of 2005 so I think we should have one last futile debate.

My question is:

Can you name ONE track that totally sums up the "Prog" ideal?

I'll set the ball rolling by saying "Cinema Show". I reckon that it has it all. Great music, changes in time, great lyrics, great instrumental sections and it's longer than 4 minutes duration.

Any others?