Yep BSSM is peerless and one of the soundtracks to my life.
Saying that, I'll stick my neck out here and say that Californication, at least for me, is their best album. Considering that John was a dead man walking for many years after he first left the band, it was the comeback we all dreamed of but thought impossible.
Hell of a vibe and tons of emotion caught on those sessions imho.