Based on a conversation with Ian, I pulled the trigger and ordered an ADA-1000-5 and an EP-800 this morning.
For most listening, the ADA-1000 will be used as a 3 channel amp for home theater use, and 2 channel for the tower tests. The Marantz will power the back speakers for home theater usage.
And Ian liked the idea of a direct comparison of the EP-800 to the SS-18.2 we were selling at Chase Home Theater ... think "intelligent DSP and great 12 inch woofers" versus "lots of power and great 18 inch woofers".
The Chase 18 inch woofer is comparable, if not identical, to the driver used in the Power Sound Audio T-18 subwoofer. Both are sourced from Eminence on the best platform/longest throw available from Eminence.