Most of our work is in the WLA, Santa Monica area. As Tweety said above, they have no multi room system currently only grandfathered.
The DVR's are pretty bulky if you're trying to hide inside Versaboxes. The standalone receivers are fairly small, possibly the size of DTV4K maybe a bit thicker.
The RF has worked for us decently.
When are you going to the site? If I'm at any jobs with the "newer" receivers I can measure and take some pics for you. Just let me know.