Anything that is going to mess up the mids in my system is out. All else besides the mids are just extensions in my book. I found the same thing when I tried a sub, more bottom end but at the expense of the magic of the mids. I'm not saying it can't work, but in my system and more importantly in my room it did not. I know when bands go into the studio they favour different studios for different sound characteristics, basically our listening rooms are like studios. They all have there own character and dynamics, the room is at least 50% of the formula. Glad to hear your enjoying those Guarneri's, they are special.