Thanks for the links, I will peruse them. As a side note, for my sub decoupler, I'd like something that either comes in the size of the EP-350 or can be cut/modified to that size. The Auralex Subdude is 15" by 15", and I've seen another at 2' by 2'. Space is kind of an issue; I don't have too much wiggle room.

M80v3s, M5HP, QS4s, M22s, EP350v3, Denon X3700H