I had been thinking of purchasing either the M22 or M40's, but recently ran across some M50 like Michaura M66's at a good price. I've done a little research on these speakers and have read some the posts mentioning them on the forum, but have not run across any substantial info. Questions:

1.What are the main hardware/build differences between the M66's and M50's

2.Where do the sound quality differences appear and;

3.What is the general view of Michaura products.

Thanks