150hp, 150hp, and 150hp would be my first 3 reasons :)
Lighter = more fun + safer
Fuel economy seems to be on point
Besides - just look at the pic of Igor's bike - it's magnificent!
I have no problems doing 700-1000 mile days on my 990 and the 1190 will be night and day better for road work, so I don't see touring as an advantage for the BMW either (I'm not totally biased - I own a BMW too but it's an s1000rr)