It looks like a good piece, I mean has Arc ever made a lousy product? Not to the best of my knowledge, this should be able to hang in there with the 'big' names, I am not sure it 'sounds better' than their XXK line

fan cooled (some of the arcs can be noisy)
powerful

dont know about their mircro-processor impedance matching feature?

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MECA SQ

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I don't know what your problem is, but I'll bet it's hard to pronounce.