Good or bad, I will give you the truth according to how I hear it. I'm hoping for great things and satisfying SPLs without distortion. One of things that I love about my current speakers is that your ears would cry "Uncle" before the speakers ever did. In the past, I have never had a problem figuring out where the spot is on the volume control where either the amp and/or the speakers were giving up the ghost so to speak. Not so with the Def Tech BP7000SC speakers-or at least I can't find that spot on the volume dial. Based on the reviews I have read, the LS50s have a point they can't be pushed beyond without them losing their magic. I just hope that spot isn't within my normal listening level and they fill my room with the SPLs I'm used to hearing but hopefully sound even better. JTinn thinks his MMMicroOne speakers beat out the Q1 speakers when the MMMicroOnes sold for $2500 per pair including stands. Maybe it isn't a stretch to think the $1500 LS50s can kick ass on a pair of $5400 speakers.
I am beginning to think that large, heavy speaker enclosures are at a disadvantage compared to well designed small enclosures in terms of energy storage and energy release that will add to the sound in a negative way. Up to the point where you push the LS50s into trouble land, they should have less cabinet distortion than a large and heavy speaker (I think). I don't think there will be much of a mental conflict with these speakers with regards to what I think of them.