Slingshot, I saw this the other day and I was hoping someone else could answer this for you since I do not have much experience with amps. I will say that my 950/770 combo sound unbelievable. I have two Marantz MA500 as well and I prefer the sound of the Outlaw amp, but take that at face value. Maybe some one who knows a thing or two about Amps like RAF can answer this. All I can say is that if you are looking for detailed, clear, and tight sound the 950/770 will provide.