We talk about a lot of music similar to Rush around here. With no new Rush music on the immediate horizon, given today's crop of artists, some new, some old, who is keeping the Rush magic alive? Rush encompasses such a wide array of music, that sometimes you may have to think of bands which capture that particular period of Rush better than others. I'm not talking sound-alikes necessarily.
For me, I'm a huge fan of late 70s Rush and Muse comes the closest, though on any day, Muse is about as varied as Rush too. There's Muse I love and Muse I hate.