Thanks for the info ridg. I'd love to get the d5200 but my budget won't allow it (according to the missus).
I have read up on rolling shutter. Nearly all of the cameras i was looking at have a cmos sensor so i guess i don't have much choice. I was planning on getting someone to shoot my wedding with it next year, that's why the external mic was important. I doubt the rolling shutter would come into it for that would it?
Apart from that, it's primary use will be wildlife and architecture photography.
External mic input is not important.
Firstly a lot of DSLRs don't allow you to adjust the mic recording level once you're recording, which is pretty useless for an event.
Secondly if you're filming a wedding, then as the camera moves about the church, the sound will vary massively. If the camera is close to the couple, you'll be able to hear them do the vows, but if you move away, their voices will be lost in the church/room. Also if you turn up the mic to make the vows louder on your recording, you'll have to turn it down again when singing/music starts.
Most churches/function rooms have a sound system that will be set up to capture and amplify the voice of the vicar/registrar and the couple. Take a portable audio recorder and connect it to the venue's sound system, then you should get much better sound. Then when you come to edit, you can sync up the sound from the recorder to the sound from the camera and maybe mix the two if need be.
Secondly you'll get a better recording with an external unit anyway.
Alternatively, if you just want a memory of the day, you could do something like this. Filmed by a pro photographer friend, his first video on a Canon 5D Mk3.
http://vimeo.com/43695907As said, if you're serious about video, go for a Canon, but if (once the wedding is done) you're more interested in stills, then go for your favoured stills camera with video functions.
If you don't lean either to Canon or Nikon, go try both and see which one works better for you.