I dont think you will ever look back with regret if you swap the FZ6 for a Versys.
Im fortunate to have an understanding wife, so I have 3 bikes in the garage. A Honda CBR1100XX Blackbird, a Versys, and a Suzuki DRZ400. Until recently, I also had a Honder CBR954RR Fireblade.
Since adding the Versys to the stable a week or so ago (my wife has had hers for about 6 months) I have retired the Blackbird. I just dont ever see myself riding it again in the near future as the Versys does everything I want. Sure, I miss the 170 horsepower when I need to overtake 6 or more cars at once on a single lane road, but the Versys offers so much more satisfaction that I dont ever find myself in that situation. Mainly due to the fact that Im usually on the road less travelled...which is what I bought the Versys for. So, the mighty Blackbird is now parked and locked away.
But, the Versys holds its own in the mountain twistys as well. I recently went on a group ride with 6 or 7 other bikes. 3 of them were Honda Fireblades, and I was able to keep up with them through the twistys. The best bit for me was, that at the end of the 400km ride, I was willing, keen and able to do another 400km whereas the Fireblade riders all had sore backsides, shoulders, necks, etc.
I simply cant give the Versys enough praise. Oh, and that little parallel twin sounds AWESOME with an aftermarket pipe