Apparently there are not many AVSers look for mid-range priced matrix switchers. I ended up buying another monoprice 4x4 matrix switch and it was worse than my original. Constant blackouts, pink screens and it wouldn't work at all with any location with HDMI baluns. So I returned that and bought a switch from HDTV Supply ... HD44L for $400
It appears to be a rebadge of the Shinybow SB-5645LCM. The package was actually drop shipped from Shinybow in Texas. HDTV Supply also sells the branded Shinybow version for $470, so I figure I saved $70 for the same product.
So far, this switch has been solid. Very simple to set up, build quality is far superior to the Monoprice switch. It has both EDID learning mode, or you can fix it to a standard EDID setting like 1080p/3D/7.1 audio. Switching is faster than the monoprice as well. Most importantly, it works with all my locations, no blackouts or pink screens.
Setting it up to work with my Harmony remotes was a slight pain because it uses two commands to switch sources ... one for destination, one for source. The Harmony database had the device, but the combo input commands were not working. I think it had to do with the lack of a delay between the Destination command and the Source command. Instead, I manually added the two separate commands with a 500ms pause in between and now it works perfectly.
The guys over at HDTV Supply were really helpful guiding me through the options (they have a ton of 4x4 switches). I originally wanted to get this $350 switch, but apparently its a new model and got hung up in customs and wouldn't be available for at least a month ...