I'm new to Opeth. Never heard of them until you guys kept mentioning them in some threads. I popped my cherry with Deliverence (long song). Then added Blackwater Park, Harvest, & Ghost of Perdition. They sound kinda cool (don't really like the death grunt singing), but not a great as they were built up in these threads. I know I only have 4 songs. Which ones are their best? Help me narrow down the downloads.