Ok, I get the gist of it. It sounds much like what goes on when you bypass the windows sound processing (kmixer in W2k/XP) through the use of ASIO or kernel streaming.
It's a bummer that you would have to pay for such a thing, but then again, it's somewhat part of the deal when you buy an Apple product.
Anyway, at least they have this new version for a less insane price, since most people would probably only use the playback section. And unless you're making your own vinyl rips, you probably wouldn't be playing back 24/192 anyway.
I would say that the Amarra setup, including the hardware DAC/ADC unit certainly sounds very good in your rig, Al. Or is that just my 4070 love coming through?