Agreed, jimfet. The ones I've always lusted after were the Stonehenge IIIs with the 604 coaxial in it.
As far as marketing goes, this is probably the best name ever given to a speaker. The tall, narrow (for its time) cabinet and the Stonehenge name were brilliant. Unfortunately, Altec's distribution at the time wasn't too good, at least on the east coast and many dealers didn't carry them - at least in my experience. I've never heard the Stonehenge series.
Cheers,
David