Thats a Dynavin system, for the E46, but it may well fit the X5??

dynavin

We're loking at doing a Group Buy on E46zone:

Possible Cheaper And Easier Alternative To Double Din. - E46 Zone Forum

But we're waiting for a trial version before sorting it all out, you're more than welcome to get some feedback etc. We should be able to get it for around £500 deending on numbers, which at todays price is US $811.45