I was at my local Futureshop looking some H/k amps mostly looking for the 245 but wasnt there. I was in the sound room with all of the speakers and such and they had a 660 i think seemed older becuase it had the old knobs for bass/treb/balance But when i turned the volume down to around 79/80 there was a slight pop which didnt really impress me. Has that changed with the newer models?, And are the front buttons as cheap as they feel?