been looking at getting a double din myself, going to go for a Parrot asteroid smart, mainly due to mounting depth in my car, its a mec'less unit

but also the built in sat nav, Apps ability, internet conectivity, bluetooth etc.

no DAB, but I only listen to pirates so FM good enough for me, but also being android bassed with a dongle and sim, would allow me to stream from something like tunein radio app.