Hey Mark -
Sorry for the late reply on the input impedance of the ICE amps. I think they're "standard" for the module and most amps which use it - 10k. Our little Virtue amps are around 20k.
Here's a thread that talks more about input impedance and discusses more fully whether it matters. Obviously, Wyred4Sound is positioning their 60k input impedence as a key differentiator in what is actually a commodity product.http://www.polkaudio.com/forums/showthread.php?t=78422
If our units don't work for you because the input impedance is too low, you can return them and I'll waive the custom build restock fee ($50). Tens of thousands of these amps were old by other vendors with the "standard" input impedance.
PS - Still, I'm going to swallow my pride and set the list price at $1,649.00/pair until these get some more traction in the market. If you live in Denmark or Australia, I insist that you buy through my dealers there who have these in stock. Shipping these overseas is not very economical anyway (sorry).