My $.02! I don't know that Watchout is necessarily more hardware failsafe considering you end up with many computers which introduces more hardware to go wrong but I think people typically spend more time and effort building the right servers for Watchout. We have both Dataton Watchout and Resolume ...
Matrox (double or triple head) or Datapath (X4 or FX4) should work great for you! With the Datapah, you could make a 7,680x1080 4x1 monitor setup UI which should take care of a lot of real estate.
@Oaktown - now I have no access to my Resloume PC to test it, but do you mean that doing a screen output to one of the mentioned BMD cards will automatically generate two SDI (key + fill) streams without checking the "is key" option? Correct but in order for the blackmagic card to generat...
Set up Artnet in your ETC lighting console and make sure both the console and Arena are on the same network (IP, subnet mask and router if applicable). If you don't know how to do that on the board, call ETC and they will gladly help you out over the phone.