Yes, let's just get this out of the way: Both give you more for your dollar in terms of features, image quality and overall excellence than anything else we've used. Period. We know not everyone is prepared to drop $2,000 to $3,000 on a camera body these days, but if you're thinking of investing for the long haul and, more importantly, have a good collection of either Nikon or Canon lenses, these are the two cameras you want to look at.

Why? Because they give you almost everything from Nikon and Canon's uber-pro top end for a whole lot less,

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http://i.gizmodo.com/5160540/canon-5d-mark-ii-vs-nikon-d700-review-shoot+out