Just curious if any peers use Nikons?
I bought D5100 as a toy, having most Nikon Lenses for my D3s, that I use mostly for photography.
right away I've noticed better picture quality, than Canon DSLRs, I used in the past to shoot weddings, less noise while high ISO. The codec is twice more efficient at the same time.. big surprise!
Not to promote Nikon, I shoot weddings with Panasonics these days. AF100 and GH2s

I guess none :) 97 views no responce!

I tried a 3100 I believe it was, but the rolling shutter was so bad I took it back and got a T2i.

3100 is a big difference from 5100 and 7000

The 5100 did much better than I anticipated in low light. See the test at 3:25 here: Nikon D5100 vs Canon T3i/600D Video Shootout - YouTube (http://www.youtube.com/watch?v=HaLLcqdttEQ)

Love my D7000 - have only used the video facility a few times when have been on a stills job and need ed to do a few minutes of video. The results are excellent. One day when Nikon make unicamera that is designed
just to capture images both still and motion they will clean up on sports and nature people who just need
the one multi task camera to carry around. It will happen.

The way that Nikon shooters rave about their gear borders extreme pompousness, yet no one is filming with them, really wish someone would tell the Nikon photographers that a camera is only a tool and if Nikon was so amazing I understand why every second person is a photographer because it's all about the gear and has nothing to do with the person behind the camera (sarcasm).

Oleg I wanted a Nikon for the 1.5X crop factor compared to my Panasonic's 2X crop, for still images. I also was interested in using them together for video. I bought the D5100 and have tested it with my Panasonic Hacked GH1. It does compliment the GH1 well, but it is not a good as the GH1. The Nikon has moire and some rolling shutter issues the GH1 doesn't have. I think the D5100 is a very capable camera, if you plan accordingly and shoot to avoid the moire and rolling shutter. I planned on the D5100 as a locked down wide shot cam and for that it should work just fine.

Hacked Panasonic GH1 and Nikon D5100 Test on Vimeo

We use two D7000s as our main cameras. We love them to death. I don't think they're necessarily better than the Canon or Panasonic cameras - just different. Rugged, versatile, with good overall performance and cost effective.