Sound is individual perception and McIntosh has many fans as well as detractors. I will say that my combination of 3.6 Maggies paired with MC501 mono blocs and a C220 tube preamp has served me very well in 5 different locations in 3 homes over the past 17 years.
While I love very old blues, 60s / early 79s rock, it is Eva Cassidy that blows everyone away. As my wife likes to say, it is as if she is in the room singing for us.
Synergy is everything IMHO, YMMV, but my gear quest ended when I found this combination. I have had zero issues and having bought my McIntosh gear used, it could be sold for at least what I paid, not that I would ever sell.
All these are the reasons McIntosh has a large group of supportive fans. Not all share this view, but there are differing views on sound. Reliability, support and value are rock solid.