I know it's hardly scientific, but I was able to get my hands on a non-modded unit and A/B with my modded version. The modded piece outperformed somewhat, but admittedly no leaps and bounds. Primarily, the digital "edge" that many associate with the DAC1 was removed for a smoother, slightly more analogue-like sound. I felt it was worth $500, especially since some modders (won't name names) want about $2,500 to modify something that originally cost maybe half that.
I felt the cost and value of the Parts Connexion mod made it a valid purchase.
I felt the cost and value of the Parts Connexion mod made it a valid purchase.