I had never heard anything by Queensryche other than "Silent Lucidity" and "Empire" until last week when I found the "Empire" album on a bargain bin price on a recent jaunt out to Liverpool.
I am absolutely blown away by how brilliant "Empire" is. I was always put off them as a kid by their "progressive" billing but the songs on "Empire" are actually very accessible and memorable. In fact there is only "Della Brown" that I dislike from the whole record.
I downloaded "Operation Mindcrime" as the only other album of worth I had heard of but have struggled with it at first listen (it is growing on me though).