RNS-510 or cheaper alternative???

[Big Worm 1]

I have just purchased a VW Passat B6 which has the bog standard stereo system, so I am looking to upgrade it to sat nav/dvd. The VW version is the RNS-510 which looks very good, but if you want any extras such as the TV tuner, bluetooth, etc, they are about an extra £200+ each.

I have been looking on ebay and there are plenty of alternatives which include TV, bluetooth, etc for a much cheaper price. Of course these units are from China or Hong Kong.

Has anyone out there had experience of these "cheaper" units, and are they worth buying? I once had an unbranded car DVD player from China and too be fair, never had a problem with it.

So my question is - get a unit from the far east, or pay 3 times as much for the official VW hardware?

Opinions please?

[pixor]

I'm in the same boat, and saw this http://www.car-vision.co.uk/vw-navi-dvd/8138-new-2... .

I'd love to find someone who has one, or a review, but it's impossible to work out the original part number.