This may have gotten lost in the discussion, but here's a specific reason why you should consider buying a mic and testing the frequency response with REW:
Originally Posted by tuxedocivic
You could by a calibrated microphone and see if you have the polarity problem some people have found.
Maybe there is some other way to tell if you have a polarity issue. I know nothing about that issue with the SHO-10s, but if I owned them, I would search for more information and verify that my speakers do not have that problem.
I would not butcher the SHO-10s that you have, unless you just want to play and aren't worried about killing their value. They are nice speakers and have value now, but they will lose value if you mod them. If they aren't satisfying you, sell them and build or buy something else, such as the SEOS or Pi designs that are more similar to the eD Cinema speakers that you know and like.