pretty much... the only real difference is the amount of power...
i have krell amps that are rated for 500W @4ohms.. with a Krell processor...
Do my axioms "sound" better because of the brand of electronics that i have... nope, not really.. I use to have Marantz, then had NAD and now have the Krell gear... There was no hugely noticeable difference in sound quality.. The only reason i have the amps that i do now is because i needed more power and can run balanced inputs, my 135W per channel marantz mm9000 was being driven into clipping region during some movies... with the Krell i did notice other improvements though..
If you are buying a reciever, i would buy on the options you feel are more important. The M22's don't need large amounts of power. Any of the major brands will have no problem powering your speakers.
Pretty much all Solid state amplifiers will "sound" the same, wether they are inside a receiver or not, the only real difference is the amount of power the amp can supply.
