Can't decide on which one. The MJ has a digital Xover frequency and 20w extra watts. I had the Ref 100 in my house and loved it. I heard the Quake in a few mates systems and loved it too, and they prefered the Quake, Opinions are divided with those who tried both. What do you guys think? It's going to be used in my current stereo system with Hi-level, and then in my future AV system, with both Hi and Low-level. Can I set Hi-level freq on the REf 100 and simultanous low-level operation? Thanx guys!