For the 20th anniversary of Nirvana’s landmark Nevermind album, several different versions are available. All feature remastered sound that brings up the volume and slightly smooths the rougher edges without sacrificing the band’s power and appeal. The super deluxe edition is the ultimate collection; yet for those wanting to experience more music from that rich creative era without breaking the bank, the deluxe edition has a terrific cross-section of outtakes, live cuts, b-sides, and original Nevermind recordings made with producer Butch Vig at his Smart Studios, along with “boombox demos” that feature Nirvana at its most raw and ready. The riches are overwhelming. The “boombox” recordings of “Old Age,” “Come as You Are,” and, of course, “Smells Like Teen Spirit” prove how much Kurt Cobain’s voice could do naturally. The cover of The Velvet Underground’s “Here She Comes Now,” the alternate take of “Polly,” and multiple versions of “Something in the Way” show off the band’s underrated softer side.