Unless you really need full frame FX, I would get the DX Nikon D5200 or D7100 for video.  You'll save some money – and these are the first DSLRs (besides the ~$3000 Canon 5D Mark III) that don't have a challenge with shot-ruining moire.

The moire from the full frame Nikons isn't as bad as the first generation Canons (or the Sonys), but it is still bad:

http://vimeo.com/57627734

The D5200 is much more resistant to moire than earlier generation Nikons (please watch this comparison with the D3200 at 1080p):

http://www.youtube.com/watch?v=x0MlBXnex3s

Here is a wedding shot with the D7100 – cinema verite style – but it shows how challenging it can be to hold focus with a DSLR:

http://vimeo.com/68908595

This one was shot with the D5200 – narative, not a wedding, but it shows the image quality this camera can produce (admittedly in a controlled setting):

http://vimeo.com/68131522

There are a couple of caveats with DSLRs for event shooters  – first, they stop recording after a maximum of 30 minutes and have to be restarted.  So you can't put a Nikon at the back of the church and leave it running.

Second, the reflex mirror blocks the viewfinder in video mode.  Outdoors, this can be a real problem, because you are forced to use the LCD for composition.  So you'll have to add the expense of a loupe, EVF or external monitor.

If you do decide to go with a DSLR, my vote would be for the $697 D5200: http://www.amazon.com/gp/product/B00AXTQQDS/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00AXTQQDS&linkCode=as2&tag=videomaker22forum-20  – it is the best value for your money.

Again, hope this is helpful,

Bill

Hybrid Camera Revolution