I currently have FireTVs because I use a FireCast for my OTA signal. Not sure when (or if) Disney+ will be available via Amazon so I’m thinking of picking up an Apple TV to have access on at least one TV. What will the 64Gb model do for me that the 32Gb won’t? I want one that supports 4K/HDR. Not sure if there is a slightly older model that will work or if I need the current gen model. Any experts out there?