I'm an F.Horn player in a symphony orchestra, so I'm a fan of the big, brassy pieces.
All of New World Symphony:
[ame=http://www.youtube.com/watch?v=yctfXIqugXc]YouTube - Dvorak - New World Symphony - 4th Movement, Dublin Philharmonic, Conductor Derek Gleeson[/ame]
Shostakovich sym 10 mvt 2 (if this doesn't get you fucking hyped up, nothing in classical will):
[ame=http://www.youtube.com/watch?v=2ZbJOE9zNjw]YouTube - Gustavo Dudamel / SBYOV Shostakovich Symphony 10 II. Allegro[/ame]
Samuel Barber's creepiest, angriest piece, an exploration into atonal, arrhythmic music. "Medea's Dance of Vengeance", about the Greek tragedy where Medea kills her children. At 8:30 is when it goes from a meditative horror movie to the murder and psychotic sound. Not the best recording, but if anyone wants a really good one, I have it. The ending is enough to make your hair on your arms stand up.
[ame=http://www.youtube.com/watch?v=EDpW65zyh6g]YouTube - Barber Medea's Meditation and Dance of Vengeance - Mitropoulos - New York Philarmonic - Live[/ame]
And a second version of it that's even louder..
[ame=http://www.youtube.com/watch?v=OdM2nlg4Dw0]YouTube - DCI Star of Indiana 1993 - Music of Barber and Bartok ( Medea )[/ame]
I also love Respighi's "The Pines of Rome", but there are no good versions on youtube really, except for another I like:
[ame=http://www.youtube.com/watch?v=qcnTwGgJ8nM]YouTube - 1991 Star of Indiana[/ame]
And being a brass player...Tchaikovsky sym. 4 mvt i. The intro and ending of this movement are just scary. Everything in between is amazing too of course, but those are easily the most memorable. The last minute and a half of the 2nd video is a big "holy shit" moment.
[ame=http://www.youtube.com/watch?v=S-c1LLZaVCA]YouTube - Tchaikovsky Symphony No. 4, 1st mvmt (1st half)[/ame]
[ame=http://www.youtube.com/watch?v=O7fbJattv34]YouTube - Tchaikovsky Symphony No. 4, 1st mvmt (2nd half)[/ame]
Then, how about a horn concerto I've performed...sadly no video, but this is the piece. It's a blast to be up in front like this. Mozart Horn Concerto in D, k412.
[ame=http://www.youtube.com/watch?v=lCilh3esigY]YouTube - horn concerto k 412 514[/ame]
And here's what should be played when I walk in the room at Affiliate Summit:
[ame="http://www.youtube.com/watch?v=U7o_3aBIeyU"]YouTube - Shostakovich : Festive Overture[/ame]
I have lots more...I'll post some after this.