When you say, #2 mlv, is that 2 kg's/m squared? I found a distributor here but we call it wavebar. It comes in 2, 4 and 8 kg's/m. I'm guessing the heaviest one would be the best.
Instead of the mlv, would it be more effective to use 2 sheets of 10mm plasterboard with caulk?
One problem I can foresee is my first ceiling. I intend to raise panels of plasterboard in between the existing pine beems, which of course means they will be able to transfrer sound past whatever board and insulation I use. In your opinion, how much insulation is worth putting in this before the transferance renders it obsolete? Bearing in mind the other ceiling, decoupled from this, underneath.