Keep in mind combining a Source, an AV Amp, a Distribution Amp and two or more Sync devices (your Displays) involves a four way handshake between each Sync and the relevant Source - what works for one person may not work for you unless you are comparing identical set-ups.
You need to understand how HDCP and EDID work - the Sync device (your Display) goes looking for an active Source and once it finds it they have to agree on video and audio signal formats and then have a constant background chatter about HDCP encryption.
If any device in the signal path breaks that background chatter (even momentarily) things can and do go wrong.
We have a Data logger that field engineers use to monitor the HDCP and EDID chatter that goes on within an HDMI signal bus - its amazing to see how complex the background chatter is and how easy it is for one device in a signal chain to cause problems.
AV Amps can be a real pain as the firmware they run often causes problems when you are trying to split the Output signal from the AV Amp.
a very very imformative response. Thanks a mil Joe. I have been looking at the Octava all week as it seems to be a good mid price option. I wanted to go QED (as with all my cables) at first - but the price for their splitters are just insane.