Several of us have the xtron DD unit .DVD.CD,SD.NAV,Blue tooth,TV but you now require a free view box as well. phone book and of course radio. A just over Ã‚Â£200 very good value for money not quite the same quality as BMW uni but a fraction of the price. They also have a UK (London) based service centre. Im very pleased with mine. Im sure you must have a local member who has one of a number of units you could see and try before you part with your cash. At one of your local meets would the best option I think.