To illustrate my above idea, I have a few suggestions:
Tagge: It is possible, however unlikely, that they may find a weakness and exploit it.
Vader: So what are you going to do? Sit around like a bunch of old nannies and let it happen?
http://www.dailymotion.com/video/x310zrv
Motti: This station is now the ultimate power in the universe. I suggest we use it.
Vader: Ha ha ha ha ha ha! While your powers die, mine will flourish.
http://www.dailymotion.com/video/x310zrv
[same clip but later]
Tarkin: Vader! Enough of this! Release him!
Vader: So beeee it!
http://www.dailymotion.com/video/x310zrv
[same clip but a bit later]
Standing with Tarkin as the Death Star approaches the Yavin IV rebel base...
Vader: Ha ha ha ha ha ha! I...am...victorious!
http://www.youtube.com/watch?v=Uw9bny88OuY
Imperial Officer: But they're so small they're evading our turbolasers.
Vader: Attack! Demolish! Devour! Burn! Grind them to dust! Go forth and death be thy destination!
[this would obviously require some delaying tactic, likely reversing a playing the footage back and forth a few times to accommodate the lengthy dialogue]
http://www.youtube.com/watch?v=rkeoqVP4N9g
Vader's TIE fighter spins out of control.
Vader: What's this? How dare he. How dare he!
[no clip available]
There're tons of fun lines available. I do encourage you to check it out. It's a fun cartoon and worth buying anyway.