Bands that do it for me, other than Opeth of coarse, include;
Katatonia
Jakob
ISIS
Edge of Sanity
Ayreon
Red Sparowes
Comus
Vangelis
aaand so on. There's a few other instrumental proggy bands amongst them, but yeah. Won't be naming them. Certainly takes a good band to get shit like that to happen though. Especially live, like when I saw Jakob I kept getting those shivers and whatnot.