If you exclude the B&O devices, all solutions will be something with sending audio from a smartphone/tablet to a receiving device, that is connected to a free input on the 95000 (e.g. the A.Aux).
This means that you must find the media you want to listen to via the phone/device/the app on it (as an example TuneIn for internet radio).
That will be your main device, the 9500/speakers will merely be ‘passive’ - you turn it on (e.g. by pushing A.Aux on the panel or the remote control and you can control the volume), no further controls there.
As for the Core/Essence - there are built-in sources (e.g. tuneIn) there, that you could control directly via a BeoRemote One/bt (plus other benefits like linking to other B&O devices like the Stage/soundbar).
This may seem a bit complicated at first.
My advice however, will be to get a Playmaker or an APE (if you can get hold on one of these) and connect it to the 9500.
Preferedly I would hardwire the Playmaker to the home network, if possible.
If you are not that much in to iOS/AirPlay, you could use the Google cast device called Chromecast Audio in a similar way....if you can get hold on one of these.
Also the small Audio Cast M5 device could be used.
Basicly there are lots of option for what you want to do - please choose a rather simple (and cheap) solution as a starter in order to gain experience in these matters.
But don’t forget: the phone/tablet will be your main device - maybe dedicating an older/now unused iPhone/iPad or an iPod Touch for this purpose would be an idea.
Then your control device is always there for all members of the household.......and not accidentially out of house.
Good luck - happy experimenting.
MM