Wow, almost missed this thread! This is the music I listen to most. I also find that the "modern" soundtracks can really bring out the best in the equipment that seems to enthral us.
I focus more on the composed soundtracks, as opposed to what I will call the compilations, i.e., the collections of popular music. However, some of those are fabulous too.
OK, I will mention some of the previously mentioned soundtracks, because they are on my permanent list:
Gladiator;
LOTR (even the complete editions of 9 or more CDs):
Meet Joe Black;
Avatar (attention bass heads);
Bicentennial Man;
The Mission (great for testing your system); and
Twin Peaks.
Some great soundtracks I haven't seen listed (or forgot they were listed):
Shawshank Redemption (often used as music in early production work on films in house, before soundtrack for specific film is finished);
Dragon Heart;
Kingdom of Heaven;
Big Fish (a combination of compiled music and composed music);
Braveheart;
Schindler's List;
Brother Cadfael (music from a BBC TV production);
Charlie Wilson's War;
Clockwork Orange (the original version);
Curious Case of Benjamin Button;
Dexter (the TV series);
Dune (original soundtrack);
Glory;
The Godfather;
John Adams (the mini-series);
Legend of Bagger Vance;
Life is Beautiful;
Revolutionary Road;
Restoration;
Shakespeare in Love;
Stargate; and
Willow.
There are just so many out there. Fabulous music!!