I did the same thing on messenger and I was going to purchase before the holidays, but they didn't have the PX6 version with the updated RAM, they said it was coming soon.
The biggest concern that I would like to get verification on is the rear entertainment as noted, they said it would work on the 2014 and up trucks, but it wouldn't work on 2007 to 2013 then they sent me a link to an adapter with a separate dvd player to use with it as the head unit didn't' have a rear video output from it. Be great to see a new version working.
Also something to check is if the Heat and AC work with remote start, they told me this isn't something they tested.
From my research Phoenix and Rhino are only resellers and the units ship direct from overseas and I am betting all the development happens there.
Good luck and very curious on what you see with it
Mike