hello,
could compare both at the Munich HighEnd this year.
There is no doubt: P03/D03 is the much better choice. Why?
The transport is much more quiet than the X-01´s one. I think you know whats the reason - if not, see the details under their website.
The DAC D-03 is much more modern than the "oldfashioned" BurrBrown based in the X-01. See the website + the nice sixmoons test.
Which sound did they serve ? The X-01 sounds in comparison to much digitalistic. A piano sounded glass-clear and precise but somewhat cool - not as a piano sounds in nature. The P03/D03 let it sound much more natural, especially when the CD-datas were sampled up to DSD - formate.
I get this combo today for 10 days. The transport I use since 6 months is a Philips based one with a sophisticated sample rate converter - developed by Michael Pavischitz who is also responsible for the former Dynaudio Arbiter pre- and power amps (see Google under Arbiter). This transport sounds remarkable better than my former Reimyo.
If there is an interest, I can give some more details about the sound of the P-03/D-03 - combo. Let me compare some days.
My LS are studio monitors Klein und Hummel O500C (see www.klein-hummel.de under "studio", etc.)with inherent DAC´s. Thats the reason why i need only a transport. The DAC´s accept max. 48 kHz sample frequency. If one choose a higher rate (88,1 or 96 or 176,2 kHz or DSD) one has to use an external DAC between the Transport and the studio monitors.
regards Dittersdorf