A friend of mine recently asked "What do you think is the most beautiful song ever?" That left it pretty open to individual interpretation, so it wasn't geared toward a specific genre. I saw a few answers that i sort of expected, being famous classical pieces and such, but mine was more about how it made me feel. The song i answered with is calming, soothing, has a simple yet infectious bassline, and a soft melody. The song has the feel of a giant sigh of relief, as if you had just completed an arduous journey that was stacked against you from the start; and were met with lots of sacrifice along the way. this is the song id expect to hear playing after you finish, and are on your way home, victorious.
Orbital - Halcyon & on & on
(the video also adds to the sheer epicness of this song)