Narrowed to just these parameters, the z1 and the widowmaker.. The others were good, but the two Kaws had the most flash, and probably fit the criteria here best.The cb750 got "one upped" by the Z1, and Honda
didn't really go after them. All us of who had Honda 750s waited for the Z-1 killer from Honda to
come out, and what everybody got was the Goldwing. The CBX might fit here, though its not listed. But then again, it was produced in limited numbers, was ahead of its time and is appreciated more now than when new. And it can't be considered the 750's alternative because the sohc 750 was gone by 1979.