Outside of the US, McIntosh are a known brand but there is no large fanbase. Generally, if one of their products is good, people will buy it but I've never seen the "wall of McIntosh" installations.
At any one time, a vendor may have a brilliant DAC in their line-up but a weak preamp. In 5 year's time it may be the other way round. I don't know why people don't pick the best sounding product rather than buying everything from one brand. I've never owned more than one product at a time from a vendor.