Second hand get 5N, Brand new get 5R. Simple
For 5N can be had for $400 with kit lens second hand if you are considering.
Both are essentially similar cameras in terms of performance.
5R has Wifi can it can sync up to your phone or social media sites with Apps? Very handy if you ask me, I'm getting an EyeFi for my 5N just to do this.
5R also has phase detect in built, not exactly sure if it works for all lenses but this is essentially dSLR auto focus tech, super speedy but not as accurate, will benefit your videos as well!
So yeah all things considered. Second hand get 5N, Brand new get 5R.