Thanks, mojocho. I did just that. I picked up a used 2008 R6 on Tuesday and will keep my FZ6.
I suppose asking about ways to increase performance on my FZ6 should have been my first go to question. I just had so much fun on the demo. The acceleration from the FZ6 to the R6 seemed to be a significant, the handling, the sound; I enjoyed it all. Maybe in the long run, I'll change my mind, or find it to be too uncomfortable to be worth it. For now, and while I have the resources to do so, I've gone ahead and have given it a shot.