I should be receiving my new Phantom 4 in a week or so. Since this is my first phantom I am a bit confused about what display to get. I am considering an iPad mini 4, but don't know how important the cellular capability is. If I don't get the cellular model, what will I regret later? Is more memory a better investment? I appreciate your help. I'm not sure if this should have been a general discussion since the P4 has some new capabilities.