from what i understand their 'lens' tech is only on the a/s/r8 cars as it only works with bottom-firing drivers.

the b&o in the a4 is an entirely side-firing system, i.e. it doesn't have the little pop-up pods in the dash and deck like the a/s/r8 models do.

who knows if the s4 will get a further upgraded system or if the next gen a6 will get it as well.

nick.

than the optional B&O in the A4

No but it does sound amazing. I am fairly obsessed with audio quality and so far am very impressed with the system in my Avant. I did drive an A8L with the B&O for a few hours after which I knew it was a must-have on the Avant. That with the iPod integration was a huge selling point for me.

an Audiopax 88 stereo tube amplifier (15w) driving Avantgarde Duo speakers with 2 additional base modules.

I'm never disappointed with the B&O in the car.

Didn't want to pay an extra $3,000 for it but really wanted it.

indeed it does. it's been a month in the b8 and i can sit in awful traffic and enjoy music and not care how long it takes to get somewhere.

cheers... rocco