I asked B&W these same questions and they just replied saying..."Hello and thank you for your email. I usually recommend using a 200 watt amplifier on the Matrix 802’s. This means that you will want a two channel, 200 watts per channel amplifier. I would recommend Rotel, Classe and Mac"
Not sure if this helps you all pass on better advice, but probably not
Just thought I'd add it to the mix for completeness