Not to repeat the greatness: :P
1. Phantom, 2003- Canon turn-front and blast in opener/Canon reprise
2. Phantom, 2006- Ave Maria... 'nuff said
3. Phantom, 1996- Crescendo into layers and percussion in opener
4. Madison, 1999- End, Jesus Christ reprise, with Cross and Star
3 way tie for 5th, sort of in order of "preference":
5. Crossmen, 1992- Horn re-entry in percussion feature, with soprano "descant"
5. Cavaliers, 1995- Ballad (Not sure which movement, maybe Jupiter), particularly percussion entry into huge crescendo
5. Bridgemen, 1980- Big, dirty (bluesy dirty, not dirty playing), swinging breakdown in Big Noise with soprano solo over top.
I said the 3 way tie to just add a few more that people hadn't mentioned yet... :)