I think editors should think about what they want to do before they do it and not rush ahead too fast. If you've recorded some clips of various tricks and things then want to put it together to a video, you should review the footage you have as much as you can and then choose a piece of music to fit.
Alternatively, choose a track you want to film stuff to, and then create appropriate tricks, scenes and combos like Mr. Heathcote suggests. When people can hear the music and see the diabolo, everything has more impact. In my opinion, it's much easier to create something to a piece of music than choose music for a video. Also filming shots to the music can give you ideas of things to do.
I find the easiest way to find a piece of music with good breaks and riffs is to listen to it in my car. If there's a break which is particularly good, I like traffic lights to change in time so that I can pull away from the line or change gear (people who can't drive manual might not understand this) to the music. This sort of music can get the juices flowing and if a particularly good trick or combo can be timed to it then it'll have a similar effect I feel.
And I can get to like a piece of music if I respond well to it with diabolo. I really liked the John Fruscianti (sp?) Boxes part of SC Jugglers, and in the NJF2005 when the music changed to Simple Plan for the show (despite not really liking Simple Plan at all). I have a compilation CD which has songs I've liked from juggling vids and I think of the video each time I hear the song.
So editors, have a lil think about what you want to show the audience, if it's just cool tricks that you've managed, perhaps don't put any music to it at all but if it's an edited movie you want to show, then take the time to ponder about it, please, for some peace!
(I happen to know that there are many diaboloists on RJ, just their juggling side is more dominant over there

We're all cool people now, c'mon, we juggle!)
Chiok