Hehe, basically everything from Rush is worth listening to, and I have favorites in all of their different "stages".
Plus Ghost Rider and Earthshine, both from Vapor Trails are simply amazing.
The best of Rush has to be Neal Peart's drumming. It leaves me speechless everytime, you hear every beat he plays, precise as clockwork... Amazing...
And, I don't know why, but their songs are uplifting, you never get down listening to Rush.