Stone Man, eh?
Ah, yes, at 2:56.
I'm pleasantly surprised that the music in Mega Man IV and V is really good, now that I've gone back to listen to the NSF rips. (I should get the NSF for Mega Man VI as well...)
They're not as memorable as the ones from the first three games (or at least II and III), but maybe because of the number of times I've played those (I guess that's why Mega Man X is memorable, too). I shouldn't write off the music from the other games just because I can't readily identify with Robot Master's stage it belongs to.