Hi Dave,
Thanks for posting your system. Very nice -- it looks like you've made some really excellent choices in terms of value-for-money.
I took a look at the Stereophile review of the Audio Physic speakers, which as I'm sure you know was very favorable, with the very understandable exception of its handling of large scale orchestral works. It's impedance curve, shown in John Atkinson's measurements, suggests to me though that it will not be an ideal match for tube amplifiers, such as the vintage integrateds you acquired. The treble would tend to be over-emphasized, and the mid-bass and lower mid-range under-emphasized, with a tube amp. But I'd imagine that the AR will be a different story in that respect!
Enjoy! Best regards,
-- Al