Seeking the truth and finding Allah.
That was gorgeous! You know, it's funny. I can't stand modern Christian music (I listened to part of the other song, but only a little. I just really hate that kind of stuff. I know it's weird.) but this, and old hymns, chanting, all the older forms of musical worship I find really entrancing and moving.
Maybe it's because there's a ton of history behind it?
My personal favorite is the one done by Yusuf Islam (Cat Stevens). It's simple but beautiful, Masha'Allah. http://www.youtube.com/watch?v=EaCcbS2b4PI