New double din head unit and screen advice

[SPEEDY77]

Hi

Ive just bought a 318 Ti Compact - 2004. Great little car.

The first thing i want to do is put in a double din / sat nav / dvd / radio head unit, I believe i have to relocate and move down the air/con heater control panel - remove the existing radio panel, then the double din unit slots into the two top slots. Seems fairly simple. I dont have an existing satnav stuff or autochangers in the boot i dont think.

My main question is this -

Am i better off getting a second hand BMW double din head unit that does all this ?

- or am i better off buying a new unit from a 3rd party brand, ive seen ones that seem to run almost like an android or windows tablet with a touch screen - if i do get one of these is it better to get a windows one or android ?

I will be using the sat nav regularly, and also wanting to play CDs and audiobooks as MP3s via a USB stick, i also listen to TalkSport a lot so if it had a DAB radio that would be good.

If anyone has done this and has any advice on what model to get, what to steer away from and where to get things please let me know - any advice welcome.

Im also planning on fitting it myself to keep any costs down.

[Bimmer Owners' Club]

I would be tempted to look at the various units for sale in Halfords to get a comparison of what's available including the fascias and wiring adapters.

Keep us informed of your progress,

Cheers   Trevor