Just my 2 cents. I seem to see a big difference in audio on a pre pro vs a AVR. cheap AT-300 ( it has some issues).
Pre Pros and AVR's Seem to been a norm to have issues last year and maybe this year.
It is a shame to spend a lot of money on a pre pro and still have issues months or a years later.
When AVR's had more power and less to process they seemed to last for ever and little issues. wish we could go back to those days and still have the Upgreaded HDMI port and current Dolby and so forht