Neil Peart is irreplaceable behind the kit for Rush. But Geddy and Alex have an inevitable void to fill if and when they make new music together (and, yes, I know Alex refuted the recent rumors, but I still think something is on the horizon).
My first choice has to go to who may be the hardest working man in rock and roll of late and one of my favorite drummers (right behind Neil Peart, in fact); Mike Portnoy. In addition to having the chops necessary to pull off those tyranno-Peart-ian drum fills, he’s coming from a place of genuine affection and fandom for Rush.
I think Dave Grohl would also be an inspired choice as he can still rock a drum kit in between playing guitar and singing for Foo Fighters. Plus he’s a fellow Rush fanboy.
How about you? Who do you think would make a capable sit-in for The Professor?