I haven't heard any Bose speakers I actually liked and I first heard them in the late-'70s. Never used their headphones and I rarely use them anyway, but I have known the Koss family almost my whole life, so.........
I did a system that has Bose Acoustimass for the front and with people talking, they sounded OK. For music, not so much.
In Milwaukee, we have Summerfest, which is the largest music festival in the World. One year, they changed the audio contractor as a way to save money and the new one used Bose Professional. That was worse than the first years, in the late-'60s. The Jazz Oasis only had a few speakers and subs on each side, so it wasn't able to cover the whole area as well as it should and then, it was unable to handle the output from the Pat Metheny Group- the HP amps went into protection several times.