Somewhere In Time. It has an unique theme, and not a single filler track. Since Iron Maiden show lasts ~ 100 minutes (of music), after you include essentials (HBTN/IM) + whole of SiT, there's still ~35 minutes left to bring in other tracks.
0. Blade Runner Theme
1. Caught Somewhere In Time
2. Sea Of Madness
3. Infinite Dreams
4. The Loneliness Of The Long Distance Runner
6. Wasted Years
7. Rime Of The Ancient Mariner
8. Walking On Glass
9. Stranger In A Strange Land
10. Heaven Can Wait
11. Hallowed Be Thy Name
12. Iron Maiden
--------------------------------------------------------
13. Starblind
14. Deja Vu
15. Alexander The Great
There - you have a blasting two SiT song setlist beginning, going into a classic proggy SSoASS moment, breaking into two very energetic SiT songs again, followed by a true fucking classic in the middle. ROTAM goes into Walking On Glass (modified for three guitar thing somehow
), resembling original Somewhere On Tour. There we continue with moody mid tempo song, followed by three crowd participation moments. Encore - a true new classic proceeding into energy liftup with beautiful Deja Vu, show ending with one and only Alexander The Great.
I would consider Piece Of Mind or Number Of The Beast setlists as cabaret nostalgia thing. But not Somewhere In Time. Why? SiT tour was 25 years ago. Only one SiT track got a large number of subsequent appearances after that. One other SiT track got a into a few setists after that. Then, one another SiT track appeared only on dozen of dates in 1999. Two were never ever played. One was dropped after a date or two of original tour. Another one was dropped shortly after first leg. Even the bootlegs of original tour are of sub-standard quality.
You can think what you want of this record, you may not like synthesizers, you may not like what direction they took with it, but it's a golden era album widely regarded as one of their best, both by fans and media critics. If any album deserves to be played in eternity, a revisit - it's SiT.