I bought an FX30 as my B-cam for docs and YT it’s tiny, autofocus is great, and 10-bit makes color grades look professional. One thing to know: it’s APS-C, so low-light isn’t on par with full-frame low-light beasts (A7S III/FX3). If you shoot mostly with practical lights or on the move, it’s awesome; if you frequently shoot really dark scenes handheld, you’ll notice more noise and will want extra lights.