At the moment, I’m currently building a SpeedyBee Bee25, which is designed to have the O3 air unit fitted. This is my first build, and I don’t have goggles yet.
Which air unit should I go for? On one hand, the O3 air unit is a bit cheaper, and I have nothing to compare it to. On the other hand, the O4 pro is newer etc, but would mean I need to make a mount work for it.
If budget is no issue then 03 goggles and 04 air units (probably the light one)
If budget is sensitive then some great deals can be found on the goggles 2 or goggles integra and either the light o4 or 03 air unit.
My personal experience has been that newly released dji products tend to have limits on backward compatibility where as the 03 or even vista’s will have more compatibility for when you decide to buy more drones (you will buy more, trust me).
I’ve got the O3 version, and it’s a solid quad. There’s an O4 upgrade kit available, so if I ever decide to upgrade, it should be a pretty straightforward process.
If you’re building from scratch, I’d recommend going with the O4, depending on your budget. My only complaint is that the antenna holders break easily, so it’s worth grabbing a spare set or 3D printing replacements—STL files are available on their site.