I tend to use Upsample for the digital CD and DVD inputs (mostly DVD, as I use it as my main transport and only use the CD player when I need to load multiple CDs). My wife likes 5-channel stereo, and I will admit for some recordings I also prefer it. Have not done the firmware upgrade yet to hear the changes to the DPL-II Music; the original implementation did not impress me. Overall, I still feel Upsample give me the cleanest sound for what I listen too (mostly jazz).