the studio adapater is a good buy for coy who have going into mulit cam set up
and have a series of broadcast camera and tripod, servo and battery.
For independent short film maker or smaller production house,
i will recommend other model.
A HVX have a differenet workflow from the rest of the HDV camera.
p2 Card is still really new to industry ...
need to wait for a while for the technology to be stable.
i would say for now if you are getting a HDV camera,
the A1 or sony v1 is a better buy