Maybe I'm cheesy but Cadets 2002 "An American Revival" gives me goosebumps. They do an incredible job connecting with the crowed in this show.
Phantom 1996 is a ride so is 2003.
Most emotional thing ever has to be Santa Clara Vanguard 2000, specifically the ballad - Adagio for Strings. It's seriously heart wrenching.
http://www.myspace.com/video/2-pro-4-u/santa-clara-vanguard-2000/1009687 unfortunately this is the only link I could find unless you have the Fan Network but go to around 5:40 and watch!!!