2 Channel Amp for Monitor Audio RS6

Morning,

I am looking to bring a better vibe to my 2 channel listening by adding a power amp to the mix. I will be using a very recent Pioneer Elite receiver as a prepro and this system must remain as a multifunction HT type layout.

Speakers as noted are a complete set of the Monitor Audio RS Silver line (Fronts = RS6, Center = RSCLR and Rears = RS1)

Sources include a Technics SL-1210M5G via PS Audio GCPH and an OPPO BDP-83 (in transport mode via a Music Hall DAC 25.2)

Budget is probably right around 1K and would love to pick up a gently used gem rather than buying new.

So far - NAD has been suggested...Arcam as well...

Thoughts?

Cheers,

VP