Permanent Waves is one of my favorite Rush albums. It just holds a permanent place in my heart since it was my companion for a few years while I was in High School. Natural Science is probably my favorite track on it but I've also loved playing Jacobs Ladder too:
JacobsLadder001 - YouTube
Yes, thats me singing, and playing the guitars over a BT. I was trying not to laugh as I sang into my phone.