Django, is it worth the upgrade to an inspire?? I have just a phantom at the moment. I notice you have 2! Greedy? Haha
It depends on what you want from your craft.
Do you want the ability to run dual operator?
Do you want the ability to swing the camera around 360 degrees independently of the craft?
Do you want an HDMI output on your transmitter for adding HD goggles etc?
Do you want a craft that absolutely looks the business?
If the answer is yes to any of those, then the Inspire is your craft. If you're not bothered about them then get a Phantom 3 Pro. It has the same camera as the Inspire and uses the same app. It also has the same sonar and optical positioning system.