I have the 684s yes, in black finish, and a NAD C355BEE stereo integrated amp, 2x80W. Could probably bring down the building if played to its potential, but I haven't dared go anywhere close yet as I have neighbours.
The one thing I miss most is a centre speaker so I could turn up the dialogue somewhat. Yesterday I watched Fragile, a horror set at a children's hospital, and they were whispering all the time, then suddenly the ghost appears and BOOOM! Might look into a surround receiver in the future if money allow, but it's quite low on any list of priorities at the moment.
The one thing I miss most is a centre speaker so I could turn up the dialogue somewhat. Yesterday I watched Fragile, a horror set at a children's hospital, and they were whispering all the time, then suddenly the ghost appears and BOOOM! Might look into a surround receiver in the future if money allow, but it's quite low on any list of priorities at the moment.