Probably the one best camera comparison site I’d recommend to folks who are in the market for a new camera

Digital camera buying guide

In order to choose the right camera--one with the right set of features at the right price--you'll need to figure out what you'll be doing with it.

In this guide, we've compiled a handful of typical user profiles to help outline the specific uses for digital cameras. Match your needs to one of these user profiles to determine the digital camera that's right for you.

Read our guide | Step-by-step camera finder

They have a very good breakdown by categories.