Au7900 #2 Heresy II's BC networks
AUX911DG runs a pair of Sonus Faber Signums on matching SF wood stone stands and alternatively a pair of Celef CF 1 stand mounts.
The stand mounts image well and are nice at resonable volume levels but fall apart in the bass region when playing rock,as you might expect.
I don't have the AU 9900 but I have the AU-D11 and they are hooked up to some Thiel CS 1.2s and Polk SDA-2As. The Polks are great for loud rock and the Thiels for most everything else.