The biggest complaint we see about small cameras is poor low light performance.
Of the three cameras, the S90 has the best low light performance.
...
I'm driving myself crazy trying to pick which of these three would be the best for me.
Canon SD940, S90, SX120
90% of my pics will be of my kids, both inside and out, and 90% of my pics will be taken on auto. Each appeals to me for different reasons. I like the SD940 for it's size, the S90 for it's awesome pics and the SX120 for it's zoom. However, I don't care for the size of the SX120. I won't be taking any video, so that's not an issue.
Which would be the best all around camera for me?? Thank you so much!

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