Well I like stoner metal (mainly the more doomy type) and love Kyuss, but to be honest, I don't feel that it's that strongly linked with psychedelia. I don't doubt that the movement in the beginning was inspired by psychedelia, but nowadays, stoner metal seems to stand on its own.
Point being that when I listen to Sahg, Sleep or Starchild, it doesn't make me think of the vintage psychedelic gems of 1967-72, Gong, Hawkwind or the Ozrics.