^^^ After watching APP's new concert video in Colombia a few times, I've been doing some research and planning on updating my old cassettes to CDs. They did record an all-instrumental album which had never been released by itself, but is included in a reasonably-priced box set which includes all their albums; I'm tempted.
I was also under the impression that the band in the above concert featured most if not all the original vocalists, they sounded so close. Turns out, none of the band singers were on the original recordings, including Alan Parsons himself! The Wikipedia article lists twenty-four different vocalists on the original studio albums, wow!
The Wiki article also makes no mention of the Colombia concert, needs to be updated (they also performed in only 3 cities in the US this year, and oddball places at that).