Musical Fidelity 750K Supercharger Owners

Any opinions on these monoblocks? I just read John Atkinson's December '08 review and he was pretty high on them. Wondering about your opinions as stand alone monoblocks.
there is also another review:

I've been enjoying them since almost two years(before that 550k). Tremendous dynamic range, warmth of mid range, delicacy of highs, sound staging and ability to drive all kind of speakers. These are main reasons why they will stay with me for long time. Used to drive Martin Logan Vista and now Summits with them. For used $4500 price what else would you be able to get in this class?