I have a Nikon D300 that I got for the more technical stuff I do at work, which is mainly documentation of instruments and repairs. It pretty much lives with a macro lens on it when it's in the shop. We're going to be doing some videos, so I'm looking at a D7100 for that job,and to replace the D300.
I bought a Nikon over Canon because of N's support of legacy lenses, since most of my shooting outside the shop is on film, with old bodies. Since I'm not a zoom guy, nor much for auto anything, that's an important issue. I've got a complete set of manual lenses now for which I paid less than a lot of people spend for one fancy AF zoom.