Hello aspicer. You definitely do NOT need a 200 watt per channel amp to drive a pair of fairly efficient M22s. At normal listening levels your Denon's amplifier section is ticking over at less than 3 watts per channel. If you push the volume of our your M22s, to antisocial levels, your Denon might be asked to produce 10-20 watts per channel.
What I figure you hope to accomplish with a new amp or receiver is better sound quality. Improvements to sound quality from efficient speakers which present an easy load to an amplifier is rarely achieved by means of more watts per channel.
Your Denon is a high quality piece of audio gear. You my friend have upgradeitis. You want something more but you don't know what it is.
Welcome.
