UPDATE:
Kana813 - you are the seller. Lol.
So what are you going to? And why the sale?
Zephyr - don't know what the differences are between K01 and the "x" variant. Newer, better algorithms, application of trickle down tech from their newest uber DAC & transport.... I don't know how that translates into audible improvements. Guido said that the X-01 to K-01 was a noticeable improvement. I know that the K-01 is partly upgradeable to an "x" but not completely (no, I have no idea what that means).
The K-01 is the best transport I have heard. I still choose my ODSE to play my Mac through, but I prefer the sound of the original CD spun through the k-01 and fed through the ODSE over running tunes from the Mac; it's a hair better, just a flea hair; albeit WAY less convenient.
I prefer the ODSE DAC over the K-01 with either CD or Mac as source. But it's a flavor thing. The K-01 is more technical and accurate while still retaining its musical power, but it's SO much more flexible with the adjustable settings. I could very very happily live with it forever and never look at another transport/DAC.
With that all said, I am putting it up for sale since I decided I still prefer my ODSE as a straight DAC, which will still be fed my Mac as my primary source. I need the $$$ since I have the opportunity to very possibly grab a Burmester 077 and 911mk3 for a great price. This would also mean my prized and absolutely fantastic Criterion pre-amp and Veritas amps (which sound absolutely amazing together, by the way) would also be for sale.
If anyone is interested in beginning talks on the K-01 (which is totally broken in), or my lovely Rowland Criterion or Merrill Audio Veritas amps then shoot me a PM.
I'm also going to touch base with my local dealer, John at Audio Connection, to see if I can borrow that Romulus Signature in the next few weeks for a day or so. I'm dying to hear it before I change anything!
Regarding the review/opinion: my listening session today reinforced my previous thoughts. I prefer the DSD/off setting for all music but classical. For classical I preferred Y2/4x.
I heard smaller differences between changing filters then changing sampling rates. I would say sampling rates were different types of ice cream (frozen yogurt, soft serve, hard ice cream) and filters were different favors of the same type; which makes sense if you think about it.
As I said I still prefer my ODSE as a DAC. CD source was ever so slightly preferable, but nothing remotely significant enough to give up the convenience of my Mac. I can get bigger differences with cable changes or room tunes. It was that subtle.
I'll keep everyone updated on my Burmester opportunity.