I have a Pioneer 545 which appears to have a problem of some flickering when using RGB. There are noticeable patches on dark colours which flicker and I believe this has been covered on other threads. I am considering getting the Pioneer 656 to replace it , I like the fact that it has decoders for Dolby and DTS . However, I would like to know if owners of this model experience any problems with RGB. I would appreciate your thoughts.