FWIW, when I started thinking about making the move from the NT to the FJR I had the opportunity to buy an '06 for 6,500. It had a number of miles (~60,000) on it, but it was well-farkled and 60K miles is not a big deal on these bikes.
But I went for a new '13 instead, given the fact that they were being discounted AND had a couple more factory goodies (Cruise Control, heated handgrips, more tunable throttle response) AND kind of looked cooler. They also found a bit more HP and torque over the previous models.
BTW, these new Gen III ('13 and '14) bikes have a settable throttle response feature: (S)port vs. (T)ouring. The Sport is really twitchy in the initial throttle rotations, whereas the Touring actually, in the first 10-20 degrees, kind of feels like the NT. But give it more rotation and let the revs pick up past 4K and it's distinctly non-NT.
I haven't really confirmed this, but I think newer FJR model years have an inhibition on max HP in the lower gears (remember, certainly on Gen III, throttle actions are really requests to the "engine room"), to keep from inadvertently wheelies and such things (my ST1300's would do this - scary for this old guy and excessively interesting to any LEO's that may be lurking about).
Oh - smoooooth engine, given it's a 4 cylinder.