MITinterconnect 
Those do effect LCR.
Bizarre that people want to buy rubbish like that and at an extremely high premium too.
Adrian, do you have a Golf GTI ?
Yesterday we took delivery of a Candy white Golf Highline with DSG; from what I can tell, this model approximates a UK GTI in basic kit and options minus some of the styling and of course the engine. Here a GTI costs around £45,000 and my 1.4 TSI set us back around £36,000.
Oh, and FWIW, I think the standard speakers sound pretty good for a car set up. Definitely not harsh like I've heard on other standard car systems and I certainly do not regret not going for the Dynaudio speakers.