Marakanetz, my Islands cd sounds pretty good. It's on the EG label -- EGCD5 (Definitive Edition remastered in 1989 by Fripp and Arnold). If you have the same edition, either our ears/equipment is very different or you might have a bad copy if there is such a thing. That's one of my favorite cd's though, of course, it would not compare exactly to the original vinyl.
The worst cd in our collection is an anthology: The Beatles / 1967-1970 on Capitol (CDP 0777 7 97039 2 0). Whenever my wife plays it, I have to leave the room.