For the last 6 years or so like so many others on here I have been trying to find the IEM that brings me the ultimate listening experience. I think with the UM3x i may have found that.
Took delivery of these a few days ago and have been simply amazed by all aspects of this IEM. Fit, isolation, design and sound quality. There's not much I can add to what others have said in various threads on how these sound, the only thing I would say is that IMO and to my ears I dont find that they lack anything, some say that they are a 'boring' iem and lack sparkle. Not for me, find myself beaming when listening to them, the detail and instrument separtation is second to none for me. They may lack a little depth compared to my IE8 but more than make up for it in other areas.
Tried many iem's over the last few years and have enjoyed the majority of them, have also enjoyed the excitment of trying out different iem's and their sound signatures. Some of my favourites have been the the Shure 530, ety er4p/s, Ortofon e-q7 and the Senn IE8. Also tried the Triple fi's which I adored but had terrible fit problems with and the MTPC which I didnt really get what the fuss was all about, also had fit problems with these. Couple that have really impressed and gave hours of listening pleasure were the Phonaks and Atrio M5 but both lacked a certain something to make them keepers.
Will keep hold of my IE8 as I really enjoy the wide warm sound from them but will probably sell on the Ety hf5 and Panasonic HJe900.
I feel now that I have no need to try anything else, the Westone brand was one of the few I hadnt tried and now that I have, I cant see me wanting/needing anything else. Will still browse the forums to keep abreast of whats happening in the iem world.
Only decision now is wether to order ACS tips for the um3x or try the um56 tips. Got the ACS sleeves for my IE8 and very happy with them so may stick them unless I read of a major reason to go with the UM56.