I watched the movie stone cold sober and was very 'wtf just happened' for a couple days. Then I watched it again (influenced by a variety of things) and it was almost a religious experience. Hunter S Thompson is a crafty genius.
Haven't seen it either, but the director's other film Santa Sangre is great.
The Holy Mountain is an incredible experience that definitely should see, you like it or not like it too much, you cannot avoid that images of it remain in your mind... probably forever, then you could also check EL Topo.