Thanks Ian. I can easily believe that the M80 is good enough so that more $ invested in their construction would produce little or no acoustic improvement.

Regarding the $10000 speakers sold by other companies it is hard to imagine that the price can be justified by the cabinetry. As a piece of furniture how does a speaker cabinet even begin to compare to a fine china cabinet, dining table, or steinway piano, all of which can be purchased for less than $10000 ?