The original scene with Darth Vader speaking with the Emperor. At the time, this was the first reveal of the Emperor, whose appearance was left mysterious.
Darth Vader and Darth Sidious (The Emperor) discuss the threat that Luke Skywalker could become to their power I always thought This version was So much ...
The Opening Title Crawl for 1980's Star Wars Episode V: The Empire Strikes Back. Great opening. Not as exciting as the first one, but it doesn't need to be.
Introduction to the Imperial March. Don't get much better 'dan 'dis. Star Wars Blu-ray 2011.