It's also a personal preference thing, to a certain extent, as with any of this stuff.
I will be able to compare to the u16. This will give you an idea cause the su6 is not much better if at all, soundwise, from what we hear.
What else, it is too beautiful inside to pass on.
I guess i will know not long after i receive it. Knowing Kingwa, i would very surprised otherwise.
I never tried such a pc setup. I guess as far as outputting a clean signal, the new di-he will extremely tough to beat. And day to day variability will be minimal. The rest depends on how good the amarero is, by this i mean as a usb receiver. This depends much on the way the code it written inside it. The big improvment is the amanero will use the same timing as the clean side does and therefore, playing something incoming from the usb input, no reclocking will be required. So jitter will be ultra-low and so the noise level because of fancy isolation and power supplies. With digital equipment, high-freq noise has an insidious effect, the HE will help a lot with this.
The balanced isolation transformer shown is basically like fancy line conditioner, usually has 1 or 2 transformers to isolate from the AC source and may have some filters too. I use one from Decware:
