Parasound is always pretty neutral. McIntosh MIGHT be neutral but I’ve also heard it be bright and harsh from the mid-treble upwards. My experience with Mc has been so negative I don't really pay attention to model numbers anymore.
My strong suggestion is to listen for yourself because this effect is rather obvious and/or you may decide it is just right for you.
Having said all of that, a well treated room may be a much more effective and better solution for you overall than amp rolling right now.