The key to understanding Rush is start at the beginning.
Listen to all of it chronologically. The band essentially grew up musically in public.
I just saw a recommendation elsewhere that suggested starting at the beginning and advancing 1 album per month to build up the anticipation like we all had to when it was new. Thought this was a pretty nifty idea. It'd also allow the opportunity to wear the good ones out and be disappointed in the weaker ones.
Also, if you start with the debut next month in January, you'll likely be caught up when
Clockwork Angels is released.
Actually, you could probably do something like this:
January: Rush, Fly By Night
February: Caress Of Steel, 2112
March: All The World's A Stage, A Farewell To Kings
April: Hemispheres, Permanent Waves
May: Moving Pictures, Exit...Stage Left
June: Signals, Grace Under Pressure
July: Power Windows, Hold Your Fire
August: A Show Of Hands, Presto
September: Roll The Bones, Counterparts
October: Test For Echo, Different Stages
November: Vapor Trails, Rush In Rio
December: Feedback, R30
January: Snakes & Arrows, Snakes & Arrows Live
February: Caravan/BU2B, and hopefully by then, the rest of Clockwork Angels
2 albums a month, and for as cheap as they go, seems fairly reasonable! It would be a great build-up to the new album!
-Marc.