The N1k has vibrations above 6k, gets stronger at 7k, from there it remains consistently the same.
How will that affect you? Not a whole lot because you will be spending most of your time below 7k RPM. At 6k RPM, in 6th gear you will be cruising at 85 mph. It's pretty smooth there. In fact, even though it's less smooth at 6,500 RPM, it's nothing bad but you will closing in on 100 mph, and at 7k RPM, you will be well above 100 and you will be way too busy keeping your head down at that point and avoiding tickets to notice any vibrations.
When riding in twisty roads, you'll be spending most of your time between 5k-7k RPM if you keep the bike in say, 3rd gear, a bit lower if you keep the bike in 4th gear. Again, the bike is geared so that most of your time will be below the strongest vibration zone because the bike will be moving pretty rapidly.
How much vibration it has is hard to describe. You need a basis of comparison. I think it's smooth MOST times until I really get on it but by then I'm going so fast I don't have time to even think about it. Once in the desert I was following this fast car moving at 100-120 mph. So basically in the "angry" zone of 7k RPM give or take 300 RPM, and I remember thinking damn I'm going fast and not damn this thing vibes! So I guess I didn't think it was bad.