I like the last two 80s albums better than Powerslave as well, but to me, those songs don't come to life in a concert setting as well as the songs from The Number of the Beast, Piece of Mind and Powerslave do. Honestly, Live After Death has practically taken the place of Powerslave for me, because those live recordings of AH, 2MTM, the title track and ROTAM absolutely blow away the studio versions of those songs, and I find the other four songs from that studio album to be pretty meh, so whenever I feel like listening to PS songs, I typically go to LAD. Whereas when I want to listen to SSOASS I listen to that album, not ME. So that could be another factor leading to my favoring LAD.
I feel I must say, since you specifically mentioned that song, that Revelations at LAD may be my favorite single live performance ever. Long Beach Arena, can you feel it?