Rounding out the Mosh Pit Region is a battle of two metal heavyweights who packed a punch with their most powerful discs. In fact, you may feel a little punch drunk after revisiting the albums in this March Metal Madness pairing. But which is deserving of being named one of the best 21st Century metal albums? Let's get into that debate.

Back in 2001, Slipknot had emerged on the scene with a stellar debut album, but could they do it again? With 'Iowa,' the answer was an emphatic "Yes." The band's sophomore set was filled with vitality and vigor, energy and angst. Tracks like 'The Heretic Anthem,' 'Left Behind,' 'People = S---' and 'My Plague' remain core songs in their catalog, while 'Disasterpiece' has become a fan favorite over time. Not to mention, Slipknot earned a pair of Grammy nominations for their work on 'Iowa.'

Also emerging around the same period was Hatebreed, who made the jump to a major label with 2002's 'Perseverance.' Channeling their hardcore roots with a heavier metalcore vibe, the band delivered a truly ferocious release that gets right in the face of listeners. 'I Will Be Heard' lives up to its name and the title track has also generated quite a bit of fandom over the years. Other standouts include the album opener 'Proven' and 'Final Prayer,' which includes a guest guitar turn from Slayer's Kerry King.

So which album deserves to move on in the March Metal Madness battle to determine the best metal disc of the 21st century? Vote for either Slipknot's 'Iowa' or Hatebreed's 'Perseverance' in the poll below.

(This poll will end on Sunday, March 9 at 11:59 PM EST. Fans are able to vote once per hour, so keep coming back to make sure your favorite album wins!)