Yioryos: Thanks for the tip about the space around the insulation as I was unware of the need for that. Yes, I estimate the suspended double drywall ceiling will weight at least 1500 lbs. The number of sound isolation clips was determined to keep the maximum load on each under 36 lbs (that's a 2.5:1 safety factor). I'll need lots of volunteers...
Mrjstark: I do envy the high ceiling on your room as it gives so many more lighting options.
Mrjstark: I do envy the high ceiling on your room as it gives so many more lighting options.