I love those three soundtracks! Forth Eorlingas is a gorgeous song, I will agree. Unfortunately, I lost the TT soundtrack over a year ago and haven't listened to it in all that time.
My favoritest of all the songs, though, is Track 17, I believe, in the FotR Soundtrack - The Breaking of the Fellowship. It's soooo beautiful and emotionally charged and wonderful!
Although, the first one on the RotK soundtrack is good, too. I think it's called Foundations of Stone...? I like that a lot.
-- Foley