Thanks. The media center is a custom unit made a local craftsman here in Atlanta. He does great work (like taking the unit back and adding the lower shelf when I needed more storage).
Before the Salks arrived, I was using a Yamaha RX-V2700 in a preamp configuration with three Outlaw Model 200 monoblocks. This configuration drove three M&K 750 speakers, which you can see in the pictures. I'll probably convert the L/R M&Ks to rear speaker duty, at least temporary until my budget (and the economy) recovers. Jim is working on a SongCenter RT but had to make some adjustments to accommodate the height of the media center shelf. (Imagine trying to ask any other speaker manufacturer to make their speaker enclosure .25 inches shorter.)
Interestingly, and I just shared this over on the AVS Salk thread, I've been switching between the Yamaha and a 45-year-old Eico ST-70 during music sessions. For music, I'm finding the Eico much more enjoyable. The Yamaha has a "Pure Direct" that claims to deliver playback with the least circuitry. I like the Pure Direct option but still find it inferior to the Eico tube sound, and I'm leaning toward using the Yamaha/Outlaw setup for movie playback and the Eico whenever I want to play tunes--even though swapping speaker cables is an inconvenience.