To get this topic back on track, here's something I've recently started to really appreciate.
>Per Norgård - Symphony No. 3
https://www.youtube.com/watch?v=RY0F8D6lIkA
It's surprisingly beautiful given its mathematical underpinnings. It's composed using techniques rooted in fractal mathematics. I haven't read too much into the theory behind it, as it's not really necessary in order to appreciate it.
I'm sure anyone could appreciate the second movement at least.