The A&H R16 (don't remember or see a USB version?) and Midas Venice F are both discontinued Firewire devices, so no real advantage on the OP's current solution. It MAY be possible to get them to work on a new MacBook via a collection of dongles, but for how long? X32 would, I suspect, be in the "mega complicated digital desk" category, more on which below. The only product I'm aware of that is a direct replacement would be a Soundcraft Signature 22MTK, which I've never seen let alone used so OP would need to check it really suits. Having said that, I would encourage NostromoUK to not be afraid of digital desks. Something like an A&H QU16 would do the job well, without being very complex, and offer additional benefits such as recallable scenes more inbuilt processing, effects, etc.