I installed a BSW system several years ago. System included all new speakers, sub and amp. At that time it was first my first audio system upgrade but I found it an easy install. I am far from an audio expert but the system is a vast improvement in every aspect and I have DSP. I was worried I would be disappointed by not going to a more elaborate professionally designed system, that it would fall miserably short of conservative expectations. Never have had a problem with the system though I had to put a pad on the gas door because the bass would make it rattle. If I could stand it, I could be one of those boom boom cars that you hear go by. Only downside was that the subwoofer was in an large enclosure then that would not fit in the side panel and eats too much space in the back. That turned out OK as I used that space for a mod I have done since. I think you will be very pleased!

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas