CAR PC in BMW E53?

[badmilind]

Has anyone tried installing CAR PC in E53? I am interested in feedback as i am seriously considering one of following options:

http://store.mp3car.com/MP3Car_G4_po..._p/sdk-014.htm

Very nice; but expensive (relatively ) and would need to replace factory radio / amplifier unit.


Or combination of this
http://www.xenarc.com/product/MDT-X7000.html

and any CAR PC (including MAC Mini)

with
http://store.mp3car.com/StreetDeck_N..._p/sdk-005.htm
As front end

Has anyone done this before? what would be the downside of removing factory radio / computer (if it really is worthy)?

Appreciate feedback / suggestions.

Thanks
Milind