I agree about how great Power Windows is. Although Hemispheres & AFTK are my favs, there is something I think is misunderstood about Power Windows. Folks hear all the synths & sequences & samples but don't realize that RUSH reproduced most of the music live in the show!
I saw the Power Windows tour in L.A. and sat right on top of Geddy to the right and I was absolutely floored over all the things he was doing, going from bass, bass pedals, keys and of course lead vocals! When I saw the Permanent Waves tour what impressed me about Rush was their orchestral nature. All three guys, each like a one-man-band. The musical output was indeed orchestral. Having seen Permanent Waves tour, Moving Pictures (twice), Grace Under Pressure and the Power windows tours, I can say that the Power Windows tour was the most performance demanding of Geddy. He even commented after the tour about it being too much for him to do and that they need to simplify. And that is what they did.
Now... Alex's crappy, cheesy, tinny tone on subsequent records, that is another story.
Power Windows would be incredible mixed discretely in 5.1, a la Steven Wilson. :music