It only comes with the one kit with a couple different drums and cymbals for each position. Everything but the kick, IMO, sounds great for metal. The kicks are a little annoying though.. if you have Superior 1 you can use that kick instead.
Yeah, pretty much what the others said. Just replace the kick with one of the awesome samples that are constantly being posted on this forum and you're done. I think drum libraries usually try to provide kicks for rock and hard rock music (except DFHS 1.0 and Slate).
I think the snares in S2 work great for metal, and the toms are godly. The kicks don't do much for me and usually get pretty heavily replaced - also the cymbals seemed much more natural in the older one. Much prefer the snares and toms in the new one though.