I'm boring. I wouldn't even describe these as obscure but..
I have what I believe to be a second or third edition cd of Atom Heart Mother. It actually has the band's name and album title ON the front cover, and I know the later Capitol Remaster CDs removed anything that wasn't part of the original LP artwork (such as cheesy cursive lettering). I also have a copy of ASoS which I got used for like 7 bucks. It's just a solid black jewel case with a tiny picture of the original LP cover on the front. I think it's the version from the Shine On box set. My copy of Obscured may also be an earlier edition CD because it has the gay blue circle with the title on the front.