DSP is kind of a game changer, EQ is a big one you'll see discussed a lot around here. But there are free options, I just happen to like the convenience of being able to take care of all of that from my DAC. The ADI-2 is not likely to have much more power either tbh because honestly not much is really needed and the engineers at RME mention that in the manual, I personally don't think power makes a difference past a certain point but it's a big topic of debate