Ah, one of these where I'm familiar enough with the band. I'm just starting out in music really (heard some Iron Maiden) right around a year ago and the rest is history. But I do have six Rush albums, with getting more Rush being a high priority. Since I only have six, I'll just rank what I have:
Permanent Waves
Moving Pictures
Hemispheres
A Farewell to Kings
2112
Fly By Night
Moving Pictures is a flawless album, but I like Permanent Waves just a bit better because of the opening trio of The Spirit of Radio -> Freewill -> Jacob's Ladder.
There's really nothing new to say about the first, or even really the second, but I do want to say about Jacob's Ladder that I think it generally doesn't get much credit as one of Rush's great songs. A great atmospheric track that I enjoy all the way through, and while the fact that there are few lyrics is, in this case, a good thing, the few vocal parts are really excellent moments in the song. Particularly the latter two; when Geddy's voice comes in it really seems to be another instrument adding to the overall atmosphere, especially "light streams down in bright unbroken beams." The lyrics don't seem to be designed to tell a story or anything of that sort, they just basically say "This is the phenomenon that we are trying to depict in music here. This is what scene you should be imagining. Enjoy." Such a simple concept, but a great, complex, atmospheric song. Natural Science is a great epic that is at least on par with Camera Eye. As far as the rest of Permanent Waves goes, Different Strings is a good Rush ballad, and Entre Nous is an oft-neglected track that is weaker than the two tracks of similar style and length but is still a good song.
Anyway, I'm definitely making a priority out of getting more Rush. I'm planning on getting Caress of Steel (I have a fascination with albums that are widely regarded as poor by the band's standards but have a few people that love them, like Iron Maiden's The X Factor) and Clockwork Angels soon, and then I'll probably go back to the beginning and get the rest in chronological order.