I heard that the older model turbo heads have better throw than the newer ones. It would definetely be one of the lights with the turbo head, like carrot said. The m6 might win because of the tremendous lumen output, and you can actually buy it for less than 3 grand.
As far as the older model lights, SRTH (Short Rim Turbo Head I think?) was/is the 'thrower' with less stipple on the reflector, more like a light/medium orange peel.
It's also going to depend on the lamps used. Some bulbs have smaller filaments than others, resulting in a narrower beam. I seem to recall a lamp with a designation starting with "N" doing that.
I have not compared the SRTH to the KT. But I can say that my D3/N2/SRTH 105 lu spot is so well defined and bright that I can see it within my M3/MN11 225 lu lamp spot. And I get the 1 hr run time with the N2 vs only 20 min with the MN11.