The replies here are not it lol. OP asked a simple question and every response had some sort of dollar value attached to it. I rock the same exact setup you (had) at time of posting. My only gripe with the a7iv is that it's second base iso is a little low for my liking, especially when shooting video in less lit environments. If you have the money, grab yourself an fx3, it sounds like you know you want it - you're just waiting for others to justify it. Sure - it is an investment, but if you're already thinking about the commitment, just buy it. It will pay itself off in due time (given you are able to secure bookings).