I have posted a similar thread about the MX150 and did not get much response. I do not think many people have heard the Mac yet. I have listened to both and they are both very nice sounding. I cannot really say which sound I prefer but the addition of excllent room correction is a very nice feature that the Mac has. I have had a difficult time in deciding which processor I would want in my system. You cannot go wrong with either. I would say they both are beautiful pieces. I would guess the Mac might retain it's value a little longer. There are a couple of threads on the Mac at audio aficionado which you might want to peruse.