Well, I don't know how I'm going to vote yet, so I'll just comment on the 3...
Sepultura = music sounds great (up to the outro), but the vocals are shit.
Melvins = not a fan of the band, saw them one time in concert and they may have been about the 2nd worst opening band I have ever seen/heard. They aren't too bad on this. Better than probably anything else I've ever heard from them. Similar to the Helmet version, the production quality here blows goats.
Helmet - terrible production. The guitar and bass sound like they were downstairs in someone's house and the recording equipment and the drummer were upstairs (or vice versa). Musically ok, but terrible sound.
I guess if I hvae to vote for one, it'd be Sepultura based soley on the music.