Have the old 6000s in my bedroom. Again not mine but my parent's. I feel it is just too voiced as in made to sound pleasant in a certain way and not at all faithful to the original signal. The midrange is phasey and the bass though punchy is a little ill defined and the treble is obviously missing a big portion of the bottom octave.
I must emphasize again that B&O can make big bucks if they give them a thorough makeover. The sound is super unboxy thanks to the enclosure but like I said add BMR drivers, LAT subwoofers and further refined amplification into the mix and you have an all round winner.
Why LAT? Super massive woofer power can be squeezed into a tiny tubular enclosure without the risk of the enclosure moving at all. And it is high speed too.
Why BMR? Because it is the future. ALT can't even stand a chance. And the BMR technology isn't even remotely mature yet.
Both LAT and BMR benefits most from either DSP or active drive or the the combination of both. And they are CHEAP!