@almarg & @charles1dad
Regarding the Coincident Frankenstein & DI pairing, thanks for all the great comments, as usual. I actually bought a pair of Coincident PREs, but Isreal isn't quite honest in saying that all of the company's speakers can be driven by any of his amps. It was very quickly evident that they did not have the power to drive the speakers, an opinion that was verified by Isreal when I e-mailed him
(and two other PRE owners I've talked to while working on the system).
I couldn't quite figure out whether I wanted to invest in changing the system to make the PREs sing (new amp vs. bi-amp), just go back to my old Coincident Super Eclipse IIIs (lovely with the Franks, but small for my room), or try something new (like the DIs). Unfortunately I had to move temporarily and put my entire system into storage for a year, so I'm without the toys for a bit... just reading for fun and storing up some opinions for the future.