"Dismal cabin management system" Oh dear! Thats been our experience of the Falcon 7X!
We've had one AOG/failure to dispatch due to a MAU failure so the boss isn't too unhappy with the aircraft in general, but needs longer range. The advertised 5950NM isn't achievable in the real world.
I suspect that purchasing an option may well be the way we will have to go. The owner really should have started to think about the 7X replacement the moment we took delivery!
The Global 7000 would be preferred simply due to its size. The three cabin layout does appeal to the owner as it will be the biggest biz jet around without going down the airliner route. We still need access to airports that the BBJ/ACJ can't even think about.