Mesch, And as you noted, the need for upgrade would be based on the addition in the headphone and phono stage. That is convenient plus the lower noise floor, but not exactly an improvement in sound. Unless, we want to argue that a lower noise will make a "big difference" in the overall sound. However, I don't believe the upgrades are worth $500 which includes shipping
BTW, for those who asked before or confirmed the feature, the output on the Rogue v1 is solely for a subwoofer and has NO application as a pre-amp out.