E70 SatNav Aftermarket or OEM

[odonus]

Still await delivery of our E70 3.0D X5 in September here in Australia.

Considering updating it with a satnav system.

On the E53 we had - A mate had a similar car and purchased a mark 4 system and installed wiring harness, satnav unit, antenae and reprogrammed the unit to work - including dvd whilst driving

What can be done with the new E70 - keen to persue and do homework for fitment post delivery.

The upgrade to the satnav, reversing camera etc was something like another 8-10K ontop of the purchase price - and I am not keen to line the BMW dealerships pockets again as luxury car tax, stamp duty etc is a killer

ANy info links would be appreciated

cheers
O