Spotify definitely kicks some ass. HA, I just went through your new post and added everything you suggested to your list, and I'm currently building THE list. It's going to be huge. I've been extremely impressed with how many of these albums are on Spotify, I should have tried to keep track but it's a little late now. I'd estimate at least 90% are in their library.
With the Master List, everyone can just save the list and then start deleting albums you've already heard.