Wow. I just went for the SE846.
From my memory, out of:
Ultrasone IQ, Senn IE800, AKG K3003i, UM 3DD, UM Miracle, ES5, JH13,
SE846 had my favorite signature. There were two another major candidates that I demoed and liked(JH13 and TG334), but the fit(as well as isolation) was the best on SE846. It also has my favorite bassy with engaging mids, relaxed treble signature. Anyways, I have a pair coming from a fellow head-fier, and I will post impressions on them vs UERM, especially on the treble part. I haven't been using my UERM recently...
Anyways, that ends my weeks of misery. So until I get more money for another high tier iem, farewell. Oh, but I will post an impression here.