Crystal Mountain rules! I also love the outro to Perennial Quest!
Those are my favorite two Death songs.
Both classics. Crystal Mountain definitely top 5 for me.
Crystal Mountain is unbelievable. But, really, all of Symbolic is full of goodness, wherever you look. To me, it's where Chuck found the perfect mix of death and "classic" metal. I mean, in addition to the songs mentioned above, think for example of the melodic moments and riffs in Sacred Serenity and Without Judgement (the section that starts around 2:50!)...
I still can't quite decide if I like Individual Thought Patterns or Symbolic the best, but in the end it doesn't really matter