I'll go album-by-album...
WDADU - "The Ones Who Help To Set The Sun"...great feel and I think it'd be awesome to bring back!
IAW - "Another Day", sure it was done to death back then, but coupled with "Another Hand/The Killing Hand", it makes for a great concert experience, I'm sure!
Awake - "Lifting Shadows Off A Dream" - definitely needs to be brought back, especially if it's the way it was played in 95 with the extended intro!
FII - "Hell's Kitchen"!!!!!
SFAM - "Finally Free", it would make a great concert closer, or first-set closer
SDOIT - "The Great Debate"!!!!!
TOT - "In The Name Of God", gotta agree with you here, it's an amazing song and needs to be brought back as well.
8VM - "The Answer Lies Within", yes I like this song, and it's a great breather to put between such heavy songs.
SC - "Repentance", I know MP was probably going to save it for 12SS, but this would just sound EPIC live, and JP's solo would be killer
BC&SL - Eh, if I had to pick one, I'd say "Wither", since it was the least played of the four songs on the album that got played live.
There are some great tracks that have gotten less than a dozen plays, it would be nice if they pulled a few obscure ones out, or rather, less-often-played tracks, on this coming tour.
-Marc.