I've just changed to an A3 TDi Black Edition Quattro, 59 plate from a 2.0TFSi Quattro. Rather than changing out the head unit again I'm considering using an iPod/BT adapter with the existing double DIN Concert/Bose. A compromise on sound quality I know against the HU replacement. The question I have is whether to go with the XCarLink or the Dension adaptors? I know the Dension is double the price but is it worth the extra over the XCarLink one? Thanks in advance.