Opus Iridium fits easily in my top10 goa/psy albums of all time, it pretty much has only class A tracks *edited a small part out because it ain't true anymore*
I used to think "this tune makes me feel powerful" was a kind of a ridicilous statement but after Shakta's ten times around the world, it's not anymore.
But the best track in OI, for me, is definitely Filteria's "Birds Lingva Franca", which is also my number 1 favourite song of all time. It just makes me "zone out" and go crazy, I feel like I'm in the music.