Well y'all, I'm kinda shocked & surprised no one mentioned the Mighty Martin Birch?! I'm a die-hard Iron Maiden fan, & since I've always LOVED Martin Birch's production on classics like Deep Purple's "In Rock" & B.O.C.'s "Cultosaurus Erectus" as well as "Fire Of Unknown Origin". I'm gonna have to say I still love Martin Birch's production on "Number Of The Beast", "Piece Of Mind", "Powerslave" & Somewhere In Time"! All of those Maiden albums sounded awesome from Martin Birch's production imho! but I'm sure there will be several of you that don't agree! I Just LOVE MAIDEN, that's all there is to it!