I have a X5 on the way, I have a X3 on the Inspire 1 now. Do I update the I1 with the I1 Pro firmware.

Yes, using the firmware for the X5 camera with the X5 camera.

If you are updating using the X5 camera, then yes you will use the I1 Pro firmware. If you update the aircraft using the X3 camera (if you decide to keep it), then you would use the I1 V2 firmware.

Update with the X3 for now , then when you get the X5 you wil need to update that camera as well.  It wont take long because the AC will have been updated and all the update will be for is the camera.
If you plan on using both cameras it is best to load both of the FW on it ( As the matter of fact you must )


Movin on had the right idea , but only if you had the x5 on it .  

Capish ?

Donnie

Donnie hit the nail on the head.