Beware megapixels...16-24 w/ great glass is more than enough. It's what's in the image that counts. Larger MP require more robust computer and storage systems. Terabytes will give way to petabytes. I just finished a job that was 80GB of raw data...
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I use both the Q and C( stealth street camera and it will fit in a bike jersey pocket) as well as Sony gear. If glass were not so pricey/limited I'd get an S..will be more than interesting to see what Sigma & Panasonic come up with.