Coming from a 2018 X3 M40i with the HK system, my new 2020 X5 M50i with the HK system is loads better. The bass has a much more full sound and the soundstage is larger. I will say that the soundstage does feel like it's coming from below - a few speakers up at the headliner would help that a ton. But overall, with a relatively simple "smile" EQ set up, the HK does well enough for me. The car only has 40 miles on it, so hopefully it gets even better as the mid and high range breaks in.
Disclaimer - I have not heard the BW system. I'm almost afraid to in that it will make me want to drop the $$$ on it...
