https://www.audiogon.com/listings/solid-state-krell-kav-300i-integrated-amp-2016-09-29-integrateds-3...
There are plenty of very good previously owned integrated amplifier options in your price range. NAD, Music Fidelity, Exposure 3010S, Classe to name a few. The Exposure would be high on my list to investigate. Or even a 2010S paired with its sibling power amplifier in a biamp configuration. No doubt it would sound excellent with the monitor Audio's.
There are plenty of very good previously owned integrated amplifier options in your price range. NAD, Music Fidelity, Exposure 3010S, Classe to name a few. The Exposure would be high on my list to investigate. Or even a 2010S paired with its sibling power amplifier in a biamp configuration. No doubt it would sound excellent with the monitor Audio's.