Hi Sput ...
As you are doing stuff for film and broadcast, I would recommend you take a trip over to dr sound's Sticky on room calibration (part of the overall calibration picture) on the DUC's Post & Surround forum ... assuming of course you haven't been there already.
A search of that forum on these issues should also turn up lots of helpful info that will assist you clarify calibration and help you meet your deliverables specs.
You might want to have a look at the legendary Bob Katz's insights into calibration ... here's a link as a start:
http://www.digido.com/modules.php?na...=article&sid=9
FWIW, personally, I find it's so much more rewarding to work on material that's got headroom. To me it often 'sounds better' and has more dynamics. But, I'm only a humble mastering engineer so what would I know.
Hope this helps. Happy calibrating.
Kind regards,
Paul Blakey
12th & Vine Post