Having compared the Atria 11 and Magico A5, I applaud your decision and question only the inference that the Magico A5's ("speakers in this price range") handle music well. Whereas the Atria 11 seamlessly integrated base, midrange and treble drivers, the Magico's....to my ear...had harsh, 'boxy' sound, with deficient treble clarity, and ample base but annoyingly clipped lower base notes, those defects evident throughout the speakers' volume range.
The B&W 802D3's have a 'different' sound from that of the Atria 11's, a more ample and deeper base, plumper midrange, transparent but 'fuller' treble....and like the Atria 11's, 'elegant' and coherent throughout the frequency range. The 802D3's to me compare with the Rockport Avior 11's....with the edge going to the Avior 11's.
Your further thoughts on these comparisons are more than welcome.
Thanks