Nex 5R question
Your mileage may vary however my personal opinion is that you're getting more bang for buck with the 5r and/or 6 than any other mirrorless system at the moment when you take into account sensor size, image quality, lowlight performance, features and price. But it depends on what you're looking for and both Fuji, panasonic and Olympus make some good mirrorless camera's which are definitely worth looking into.
Nikon 1 is a nice compact system with great AF but isn't in the same league for IQ, features and low light performance. Canon are just havin' a larf with their mirrorless system - wait for the next generation.