Yes, the dialog makes me wanna breakdance on a broken glass, but this scene now looks so cool that I couldn't care less about it.
Although BarBarJinkx's idea sounds interesting. If you had Obi-Wan's "Try not to upset him" before General Grievous' "Jedi Scum" - it might actually sound better. Then GeeGee would have a good reason to call them like that.
OR! You could just cut that whole dialog out. Like, for example, here @0:20 (after that droid gives GeeGee Obi's and Anakin's lightsabres) - http://www.youtube.com/watch?v=ag5ItWDN0Ko - you could just cut away to R2-D2 @0:42.
Just an idea.
EDIT: Dude, I just messed around a little but and in IMHO - it looks very good that way! That droid gives GeeGee their lightsabres and then (if we cut that whole BS dialog out) he says "Your lightsabres will make a fine addition to my... collection!".
I don't know, I think it plays pretty cool that way. We loose only 22 seconds and it's not like that dialog is very importaint.
What do you guys think?