Thought I would update this post (for anyone who is interested)
Having given the Alpine Ezi-Dab a go, I realised (very quickly) that it would not fit the XK's radio. Connections were not at all compatible, and the professional fitter very quickly waved the white flag. Fortunately, as I was within the distance selling timescales, I returned the product for a full refund, and it was back to the drawing board.
At face value, the £500 dealer option was beinging to look like the only way forward.
That was until I stumbled across the Roidmi 2S Music Bluetooth Car Charger
This was the route that I really wanted to avoid like the plague - I was really determined not to have to rely on an FM Modulator, as I had tried these in the past and was realy unimpressed by the quality.
Anyway, with little option, I splashed out my £20 on Ebay, and the gizmo arrived today. After spending a couple of hours driving around with it up and running, I have to say that I am rather impressed. Once connected by bluetooth to the phone (in my case, an iPhone7), you can download an app which sets the thing up onto an unused radio frequency. After that, anything that you play on the phone (music, streaming services (e.g. Spotify) or Digital Radio) all get broadcast to the Roidmi and played through the relevant radio channel.
The device is also supposed to act as a handsfree phone kit ..... but I'm not so sure about that !
So far :
+ Sound quality is great - no interference experienced (yet)
+ The iPhone will pair to the Roidmi for music, and still also pair to the car's handsfree setup for phone calls
+ The device will monitor the status of your battery and will sound an alarm if it drops below a threshold that you set
+ It fits out of the way in the glove box accessory socket - so not visible in the car
+ It has 2 x USB sockets built in for charging
+ Can be moved from vehicle to vehicle
- Handsfree use is rather poor - I would avoid that.
So, if you have a similar setup to me and you are looking for a cheap option for music streaming and/or DAB, you might want to try this out. I have to say that I am really very pleasantly surprised.
The manufacturer's site is :http://www.roidmi.com/en/, and the device is readily available from all good Ebay retailers now !!
Cheers
Geoff
PS - Apologies with the formatting of this post - really not sure what is happening there