No, its not overkill. And no, you can do better. For less even. Because your speakers are 90dB sensitivity, which is a bit low by my standards but still fine for one of these https://www.ravenaudio.com/product/nighthawk-mk3-tube-amplifier/ A Nighthawk will satisfy far more than any Mac at any price, and yes its enough power for your speakers.
Its also the kind of quality that will have you happy for years and years. You'll be upgrading everything else long before you will feel the need for more amp. If indeed you ever do! It is in other words the sort of foundation stone on which a great system can be built.
What does he mean by that? I can hear you saying. Well let me show you exactly what I mean by that. This is my system, and the Melody amp in it is not the caliber of the Nighthawk. Your amp will be better than mine. Upgrade everything around it, one day here you are: https://systems.audiogon.com/systems/8367
Its also the kind of quality that will have you happy for years and years. You'll be upgrading everything else long before you will feel the need for more amp. If indeed you ever do! It is in other words the sort of foundation stone on which a great system can be built.
What does he mean by that? I can hear you saying. Well let me show you exactly what I mean by that. This is my system, and the Melody amp in it is not the caliber of the Nighthawk. Your amp will be better than mine. Upgrade everything around it, one day here you are: https://systems.audiogon.com/systems/8367