So the headunit upgrade is done. I bought a Delphi RCD510 out of China ($150), along with an OEM 9W2 Bluetooth kit ($90), all for the grand sum of $240AU delivered! >D
The Delphi unit does has some differences to the Bosch unit, predominant difference being the delphi has no DAB radio reception, and a minor button layout difference, but apart from that I can't say I can notice much difference to my friends Bosch unit.
But for about 1/2 the cost of the bosch unit, and having the USB input direct to the HU (not needing the media centre addition the Bosch does for iPod) its awesome! Also unlike the OEM RCD500 when using an MP3 disc, it would not display the info on the dash. But with the RCD510 I now get audio info (title/artist) on the MFD. Nice little surprise i wasn't expecting
Also with the 9W2 Bluetooth I have both full functioning OEM hands free (which pauses music on the HU also) and also have audio streaming from the phone if I choose (but tend to use either USB or iPod for music).
Some pics:
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