What size tires are you running?

[Papa Weeley_imp]

And not to knock your idea, but keep in mind that one of the main reasons these bikes feel so agile is those comparatively narrow tires. Slapping something wider on there is most likely going to affect that negatively. Coming from sportbikes, I have a great love of nice wide tires, too, but sometimes form just has to follow function.
Just wanted to toss that out there in case you weren't aware - let us know what you do, and how it works out!