bonesy
Member
Personally I think the LCD-2 Classics and the LCD-4 are the best of their entire lineup. (Yes those are their cheapest and most expensive models...) Everything else in in between sound weird to me.
The Clear's are a completely different kind of sound. Much brighter and more airy. These are also my favorite Focals. (The Utopias have practically no forward projection and just give me headaches...)
Your 660s are kind of in the middle of the Audezes and Focals. If you want solid bass impact and with clean and inoffensive mids and treble go with the Classics. If you want a better sense of clarity and more open soundstage go with the Clears.
For this upgrade I wanted "solid bass impact and with clean and inoffensive mids and trebles" so that was the clincher and they deliver that.