I use my camera for shooting video only, I rarely take pictures.

You said it yourself, if you want video use a camcorder. I despair of people who use DSLRs primarily for video.
Having said that, I use my camcorder for occasional still photography. I have a Panasonic HC-V700 (recently replaced by the 720) and it takes very good still photos. IMO camcorders are for video, DSLRs are for decent still photography and mobile phones are for talking to people!!!
You should get a HC-V720 for $500.