Welcome!

I would get the M80s as the H/K will work just fine and if you want/need more power it has preouts to feed the signal to an outboard amp.

I ran my M80s with a low wnd Denon 1804 and it reached db levels that would damage your ears if listened to for any length of time.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70