I recently added the Esoteric G-ORb to the P-03/D-03 which I have had for several years. The difference is subtle but important: smoother, more realistic, less etching, less forward. Yes, less "digital", although that seems to mean something different to everyone. But the problem is cost--I got it used, at a great price, well below half list. At anything approaching full retail price, that is a LOT of money for a subtle improvement, however worthwhile. At anything like the list, I would consider a preamp upgrade instead.