After the rousing success of last year's March Riff Madness, we've decided to shift our focus this time out, and find out who you think is the greatest rock drummer of all time.

So we spent several days arguing among ourselves and compiled a field featuring 32 of rock, hard rock and metal's most famous timekeepers. Our list may not be perfect – even to get things whittled down to this size, we had to make some agonizing cuts – but it offers an intriguing blend of genres, decades and styles.

After some very close and difficult contests, we've moved onto our Final Four round. You can vote once per hour in each of the eight current March Drum Madness battles until the second round closes on April 2 at 11:59PM ET. The ultimate winner will be revealed on April 7.