For purely surround sound, you will have far more choices on DVD than blu-ray. But since you started the thread with blu-ray in mind, my list below is strictly just for blu-ray as well.
1) Star Wars Episodes 1 to 3
2) LOTR series
3) The Matrix
4) Saving Private Ryan
5) Master and Commander
Honorable mention: Tron Legacy, Jurassic Park, Star Wars Episode 4-6, Gladiator, Pirates of the Carribean series, The Others (good/disturbing sfx but is only best appreciated in a quiet environment), Battleship