This is bit of a longer thing :) Yes you can upgrade I/O boards. They will be out in another month or so. They have 20 BNCs but are 12G SDI every 4th connector. So essentially you can have 5 12G sources that are either single link or use 4 QUAD 3G in 2SI. UP to 2 could be QUAD SQD if you like. Or you can have instead combinations of 3G1080p on multiple connectors that will be unconverted in the MEs. If you want SD/720p/1080i then when not using the converters for QSQD you could have 8 of those that convert to 1080p then up convert in the MEs.
So there is a lot of "stuff" you can do. Maybe talking on a phone or Skype would be better?
#Acuity