I'm the poster Silent1CB mentions as not being very happy with the SX10. While I'm thrilled with the SX10 (and that incredible zoom) in daylight and at night when you know you'll need a tripod (like for fireworks), for those in-between starting-to-get-dark and/or cloudy days, the SX10 just doesn't take pictures as well as my S3. Like Silent said - they're too dark.
We have another marching band competition coming up Saturday night, and I won't be taking my SX10 - I'll be taking my trusty S3. I'll give up the zoom in favor of know I'll get some decent shots.
And thanks, Silent, for reminding me that I need to adjust my file size - those 10mp files sure do take up a lot of room, and they take longer to write to the memory card, unless you buy the faster cards (which I've done). I've seen cameras out there with 12 and even 15mp - wow! And somebody on this board (I think Groucho???) posted about a year ago this real neat graph/chart showing how you really don't need all those mps anyway, unless you want to enlarge a photo to billboard size.