Warchild is obviously the subject matter expert for this question but here's my .02....
I've come off the busa after a few long days seriously questioning the wisdom of touring on it. The riding position is still a bit aggressive and causes pain in my knees and sometimes wrists if I don't concentrate on riding position. The lower wind screen results in buffeting and even worse you're immediately profiled as a sport bike ass-clown by even owning the machine. Now, having said all that....I love the immediate, gut-wrenching speed you get when you twist that throttle. The bike literally leaps in joy when you explore the new world above 7000 rpm. It also cruises solidly at or above highway speed. This bike is just a marvel of technology and steady as a rock on the highway or in the curves. It's styling is sexy and immediately recognizable "around the world". And lastly, there aren't many folks touring on this bike which separates you from you crowd once again.So at the end of the day, the pros outweigh the cons. (and it's 4-5k cheaper than the K1300GT)