@tice34
You should upgrade your electronic. Your Marantz SR6012 AV receiver is holding back the performance of your system. It is far from ideal pairing with your SB Veneer S speakers. You should make efforts upgrading from your Marantz SR6012 av receiver.
Since you’re doing both stereo for music and surround sound movies I would recommend getting AV separates.
What’s your setup? 5.1/5.2 or 7.1/7.2 or 9.1/9.2? Marantz makes really good AV preamp surround processor (pre pro) and you should seriously consider the new Marantz AV8805 pre pro or a used recently discontinued AV8802/AV8802A pre pro. Other great sounding pre pros that I highly recommend would be the Classe Sigma SSP (optimized for stereo music playbacks), a used Classe SSP 800 (discontinued), NAD M17, Krell Foundation, a used Krell 1200U (long discontinued), Anthem AVM60, Cary Cinema 12. But the Cary Cinema 12 consistently has had HDMI board issues. Their HDMI boards start failing after couple yrs of use. Seemed like most or all units have failing HDMI boards.
As for a multi-channel power amp I would highly recommend either the Rotel RMB-1585 five-channel amp or the Parasound Halo A51 five-channel amp.
These AV separates will elevate the performance of your system to a whole new level than what you currently have (Marantz SR6012 av receiver).