External video recorders are about more than improved image quality. Find out more in my review of the least expensive model that includes a monitor, the Atomos Ninja 2.
Sean Reid, at ReidReviews, does some of the most in-depth camera reviews of anyone online or in print. He has just published his look at the remarkable Sigma DP2 Merrill, which I raved about here a couple of months ago. If you’re considering one of these Sean’s review is compulsary reading. ReidReviews is a subscription site.

"Every time I go back to a module I had already seen, I learn additional things. I have never seen tutorials that have the excellent mix of what the features are,
how to use them, enough of the under-the-hood information
and concepts so that I can utilize the features creatively and efficiently,
and just enough humor to keep the motivation level high. Wow!"
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The Luminous Landscape – What’s New