SX 10is or...?
If taking multiple fast shots are a criteria then look at the Casio EXILIM Pro EX-FH20.
This remarkable new camera from Casio is capable of ultra high-speed burst shooting at 40 fps and can record high speed movies at up to 1000 fps.
I watched a televised sale on QVCUK last week on this camera.
It was a twenty minute (repeated 4 hourly throughout the day) presentation.
On the show they had taken a 40 fps shot and printed all 40 frames.
They all looked excellent.
They then did a live 'slow-motion' video of the presenter juggling balls and played it back immediately.... Truly amazing.
They also showed a balloon filled with water and popped using slow-motion video.
When played back you could stop the video on the frame that displayed no balloon but just a ball of water.
If I were in the marked for a camera for this usage alone I would buy it no question.