Either of those amps would be fine for you. Why didnt you buy a pre/pro to start with and an amp? I ask that, but I have a receiver with an amp setup myself... If I were you, Id probably side with the Rotel amp. If you like Rotel, then stick with them. For resale also having matching components is better... Or when you move up to a pre/pro made by Rotel, then you could have matching components still. Granted you could get say an Outlaw pre/pro and then you would be better served with having gotten the 755.