I've heard both the UE10s and 11s, but only in the universal demo thingies they had at canjam. UE reps trick you at those meets, suck you in by giving you one set, and then on up the line until you're listening to the UE10s and going, "Yes, this is what I need. Thank you very much." The UE10s are about as clean as I've heard, and yes, I suppose "neutral" could used here, but I'm always a bit suspicious of that word. Anyway, I loved them. That said, I'm getting the UE11s (I've had trouble with impressions and am getting a third set next week). I am not a bass-head by any account, but it's quite seductive here in that it is soooo present, but not overpowering, not sloppy, just very tight and tidy. I'm a bit nervous that once I get the customs the bass will have even a bigger presence, and I don't want that, but I liked what I heard so much, I'm willing to take that risk. Also, I am looking for fun phones. I think my other headphones got the reference thing covered, so a little bottom end is a good thing in my mind. I'm just hoping that proves true.