PS Audio NuDac

Anyone familiar with this? I have the D Link III and I love it but it can be harsh in the treble, particularly with Piano Music. I use a V-Link to get around the asynchronous issue for USB but I'm wondering if it is worth upgrading to this new unit.
It's probably a pretty substantial upgrade based on what PS Audio is saying about it, but I don't believe it's shipping yet. You may have to wait a while to get any user comments.