Yup, that is why you pick a reputable modder who mods with a goal in mind and with a design philosiphy. And one that has the same goals as you do and also one that you can hear their results. Just R&Ring parts is no guarantee of success by any means. And just as Drubin found out can actually make things worse. That is another reason I picked on RAM. I could hear how the mods sounded and their website is full of information concerning their mods as well as their design philosophy.
Adding a DAC does create another layer in the chain as well as set of other decisions such as cabling and power cords.
I am also glad to see that dcaudio received some direction from his thread. As he is the one that has to be happy with his decision and not anyone else.
Chuck