I have THREE Rush tattoos on my body. For SW mixes, I'd go Super-duper Deluxe for Fly By Night - Signals.
I'd have to think long and hard about other albums. They all have some great songs. They just become a bit uneven and/or kind of poorly recorded or produced after that.
E.g. I LOVE the songs on Power Windows, but the sound is atrocious to me, particularly the drums.
2112 would be the holy grail...but I thought maybe that ship has passed...in terms of anniversaries.