2008 Honda CRV Aftermarket GPS - Perth WA

Hi all
I've just brought a 2008 Honda CRV and want to buy aftermarket all-in-one GPS Navigator / iPOD / Bluetooth / DVD Player /CD Player / TV / Radio unit. I would like to retain the steering wheel controls and a reverse camera option is also handy.
If anyone has bought something the same or similar, could you please advise:
*what did you buy?
*who was the vendor?
*did you install it yourself & was is easy/difficult or did you use a professional?
*did you buy a specific unit for thr CRV or a generic unit that required a fascia plate?
*are you satisfied with the product?
*was it value for money?

I've searched ebay to find quite a lot of Chinese manufactured units for sale ranging between A$500-A$700. Can anyone advise the the reliability of these?

Searching other products I have found Alpine, Eclipse, Polaris & Pioneer units starting at A$1500.

I would welcome your onions/experience about these units