The damping material I suggest is R11 or R13 fiberglass insulation. It must be supplied separately but is easy to find in any hardware store.The two π speaker is designed to handle 100 watts RMS continuous power, and it does not sound strained at all even at that power level. So 65 watts will be just fine.
I like using wedge-shaped mini-stands because the aim the forward axis of the speaker towards the listener without raising the speaker enough to start getting floor bounce. Another way around floor bounce is to add subs, which then also increase bass extension and smooth room modes. But if that's not an option, use angled mini-stands if you can. Only in cases where you have to get the speakers up over furnature would I suggest stands, and in that case, the furniture may help mitigate some of the floor bounce notch.
Gotta run...
...it's summertime!