Nick already has speakers, i do believe he is adding a 180 soon. Nick, can't help with green glue, soundproofing, etc. Everything I've read is you need to be disconnected from your two walls, otherwise the sound/vibrations with transmit right through any dual layer, insulation, etc. Not familiar with the green glue. Will give some thought to your AV equipment placement.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85