For you fans of Mastodon and heavier music, check out The Atlas Moth's album. From the Pitchfork best metal of 2011 list:
"On their sophomore LP, the psychedelic, progressive Chicago quintet uses multiple vocalists, three guitarists, bass, and drums to create a kaleidoscopic rush of colorful sludge, post-rock, doom, lighter-lifter metal, and clear-headed pop. This band makes catchy, ambitious music, and they did a better job at being Mastodon this year than Mastodon themselves"