Personally, I’d choose:
#1 iPhone 15 Max - I feel like this will be the fastest and most responsive setup, all the latest tech upgrades give you extra headroom to work fast / in the moment. I like the use of a powered hub with USB-C connection it’s more direct than lightning setup and gives you connections like on a laptop. Touchscreen is an asset both as mixing aid and backup. Main concern, if you need to use the onscreen keyboard a lot. The touchscreen is small, but it’s a 15 Max so still usable. My top pick for performance and reliability and ergonomics.
#2 MacBook 2013 - probably a solid, easy setup, with built-in connections. I like this mostly because it’s a known set of competencies. My only concern is Neural Mix, does it run and at what quality? Otherwise a solid setup for basic DJ features. Computer keyboard is a decent aid “controller” and good for searching library (for those Open Format moments). My 2nd pick for reliability, decent performance and built-in connections.
#3 iPad 10.5 2016 - a solid performer, and the screen size is a plus. But setup is jankier with the Apple Lightning adapter. That’s my biggest con, I’m not a fan or the Lightning adapter. It hasn’t failed me but just doesn’t inspire confidence - and when you need to add extra items, it can get awkward/complicated really fast. Other cons, older, so you may not get some or all Neural Mix features. And once again, onscreen keyboard for Open Format moments. My 3rd pick mainly because the Lightning jack can make the setup more awkward/complicated.
Notes:
In the end, I think any of these will work just fine.
