From what I am hearing from folks in whose ears I trust that have listened to the 800 D3 extensively, the opinion is that 800 D3s are "giant killers" surpassing designs costing in high six figures..... Proper break - in and speaker cables are the key as well as the appropriate amplifier .... None of Classe, Mac, rotel, Bryston & other mediocre & bland amps.... Cardas golden cross appears to be a great match as are Magnan Type 4s, both in true bi wire mode, without usage of the jumpers on its terminals... FM Acoustics are apparently great on these as are german Symphonic Line monoblocks, solid state...Tube side: Mastersound tube monoblocks and VTL EL-34s & Manley monoblocks and Jadis monoblocks & PA150 appear to give be great sonic match.... The only store in the NY tri state area that has 800D3s is the Stereo Exchange, so I ll go and will give them a brief audition sometime next week,....