What is the best digital camera, combining image quality, flexibility, and response time.?

My current camera does not do well in low-light conditions, and there is a long delay between "press and click".

Check various reviews at dpreview.com

go to cnet.com for the best reviews

Hands down for the money the Canon A620-read any review.

I say Casio Exilim EX-Z57. The underdog in the digital camera market.
It is very quick, image quality as good as Canon's, very flexible and very responsive.

Plus, long battery life.
Canon does not have that feature.

Do care to do a review.