This one already puts out 140rwhp as it sits. Not quite as much as my old R1, but enough for the street.
There is no need to build any bike motor unless you are racing - it's cheaper just to buy a newer bike, and they come out with more power each year.
As for personal touches, this one is on overkill on that. Almost every part of the bike has been changes or modified - even the frame/swingarm is not stock. There's a lot more than people notice.
"Racing is life. Anything before or after is just waiting." - Steve McQueen
I hear that. My bike is staying pretty stock, I had the suspension reworked, some bolt on power stuff, some stuff that just fits my own taste aesthetically that most hardcore riders would probably rag on me for... but they don't have to ride it, and just some small touches to make it how I wanted it. I'm not a diehard track guy by any means, but I plan on building an R6 for track day thrashing.