Moving from Esoteric P03/D03 to P03/D01 Combo

I'm interested in anyone's feedback who has moved to or has heard the P-03 or P-03U transport with both D-03 and D-01 DACs. I am contemplating selling the D-03 and moving to a pair of D-01s as I have heard from Esoteric that Redbook is better still and SACD playback is nothing short of gorgeous with the D-01s in the circuit. I am already extremely happy with the P03U/D03 combination however, the 'itch' has struck and I have an opportunity to upgrade.

I'd appreciate any feedback or advice on this; the difference has to be non-subtle and extremely noticeable musically for this jump to be worth it to me. If you look at my system as posted and can suggest that a better pre-amp (already happy with the CP-700 Classe 2-box) such as the Esoteric C-03 or Edge 1.1. Signature, or any other system upgrade/change is a more worthwhile upgrade, please do not hesitate to let me know.

Thanks in advance for your help!