All the above comments are quite pertinent on Mac speakers. If you have access to the McIntosh book "For The Love Of Music", their speakers and developement by Roger Russell is quite interesting. I personally have never heard their speakers, but sure would like to. I've owned their electronics since 1978, and I'm very happy with them. Like it was mentioned, if you like what you have, stay with them, and forget any negative babble you read about. Mac has taken quite a few hits over the years, mostly by folks who've never heard their gear.
Why so negative about McIntosh speakers?
It seems that McIntosh speakers receive lots of criticism here on A'Gon. Looking for serious answers why. I still have vintage Mac XR-7s and even they sound rather outstanding coupled with the 107 Environmental Equalizer on my system. Maybe I don't get out much.