I've read a lot of posts about the dramas involved in changing head units in the 8L A3/S3 - interference/popping when using the pre-outs. Does the Becker GP head unit avoid the issues with interference/popping caused by the Bose amp? Does it really "plug and play" with the Concert (tape head unit) in a 2001 S3? No popping/interference? Do I need any cable adapters etc? It's pretty expensive (like 4 times the price of an Alpine unit with similar features) but if it works well then I would consider it. http://www.soundlabsgroup.com.au/p/Becker-Grand-Prix/Becker Grand Prix Appreciate any input.