I agree - likewise I have the AiS. I have also fitted a metering chip to it, so it is a very convenient lens.
Weight wise (510 to 540g) and focus throw wise (all 205 degrees), there is not too much difference between the AiS, Ai, or the K (except this latter one has to be Ai converted), with the AiS being marginally lighter and marginally more compact. The earlier Nikkor 200mm f/4.0 lenses are much heavier and larger than these three versions and optically are 4E/4G rather than 5E/5G configurations.
You'r welcome Tom I have the AIS and like it, it's very compact.