Ok, the G61/HD621 will open up new possibilies with higher soundquality, room correction and the ability to clean up and dejitter HDMI audio and video as well as deliver lossless HD concerts and movie audio.

What I see as a problem is with your 18bit speakers. They would need to be upgraded as well to take advantage of the apodizing upsampling and soundquality that the G61/HD621 has to offer.

So yes, I definately concur with you doing the upgrade/tradein, but you will realize the full potential of your system when your mains are upgraded to 24/96.

DSP8000SE, DSP7200SEHC, DSP5200SE sides, DSP7200SE rears, 861v8, 210, Sim2 Ultranero 4, Stewart Cinecurve 2.35:1, XEIT CM-5E Anamorphic lens, Dune HD Duo Cinema 8K and Wireworld Platinum 48G HDMI -> UHD722 -> Shunyata Omega Ethernet. Shunyata/Furutech power-cables/filters. SR Master Fuse@861v8. Uptone Etherregen with 10MHz OCXO clock.