I always wanted a 903 Saki. Back in its day it had about the same rep. the Hayabusa has today.
I decided to go with the Gold Wing when it came out in 1975 instead. It ran a 12.9 to the 903's 12.0 sec 1/4 mile. But after bumping the timing up, I got it down to 12.5 with an extra wide rear tire.
A few years ago, I missed a chance to pick up a beautiful low mileage burgandy/red Z1 off its original owner (my Wife's cousin). He said that he forgot that I wanted it, and sold it for $1200 to a stranger.
As it turned out, I've owned several Hondas, a Yamaha, and a Suzuki, but no Kawasakis.