I've had my FZ1000 for about 2months now. It's a very good bridge camera, but reach is a bit short, only 400mm equiv. AF is very fast, and it does handle like a dslr - faster than the D50 (I've seen the D50 in action, I couldn't believe how slow it was).
I still use my Canon 7D as the main birding cam, but the FZ1000 handles video and day to day stuff. It's quite the package... Better than my GH3 + 100-300 for birding.
The Nikon 1 series like a V2 or V3 plus the FT1 would get you much better reach, faster AF and handling.
If video is important, then the FZ1000 is the current bang-for-the-buck champion.