Interesting... So you have three sets of 7.1 speakers, all driven from a single source, and two of the three have displays associate with them. I've seen discussions on this forum about some unusual system configurations, but that's not one I've seen before. Is the Niles switch at the pre-amp outputs or after the amps? Can all three spaces be in use at once, or does the Niles allow only one space to be active at a time? If only one is in use at a time, then you could add an outboard video switcher in parallel with the eight-channel Niles switch and lose no functionality. In fact, you mention that the Niles units are a/v switchers - do they already have the capability of switching the video?

If all three rooms are active at once, then the audio switch would need to be boosting the signal some, in which case you might be able to do the same with the s-video or composite. But if all three are active at once, wouldn't there be some problem with control? That is, you'd have someone in the main room (room "A") running the show, and somebody in room "B" would not be able to select different music or pause it to answer the phone without screwing up the person in "A". And unless the Niles switch has separate volume control for each output, all three rooms would seem to be fighting over the volume.

Historically, the custom install market has not been Outlaw's focus - installers who are also local dealers for a certain line will typically use the line they carry rather than buy from an online dealer, and the original goal for Outlaw was to provide the average joe with good gear at a better price by using the Internet direct sales channel. On the other hand, installers who are not dealers could certainly make good use of Outlaw's amp offerings, and the 990's core architecture comes from a processor that does sell through traditional channels (and the RS-232 support allows custom control systems). What processors do you normally use for these installations? How do you provide the needed monitor outputs with those processors?

I doubt that it would be possible to make firmware changes to provide OSD at the second zone video output - since the second zone video switching is independent of the main video switching, I would assume that there would have to be hardware changes (potentially significant ones) to allow the second zone to get OSD support. I could be wrong, of course...