Well I find the SM3's more relaxed in their treble style than both the Westone 3 and the Coppers (but the Westone 3 is from memory), which is why I think they're a worthwhile consideration for the OP with their mellow side like the IE8's. But while being so relaxed, they still have an incredible amount of detail. Some recent owners have been finding the treble rolled off, or recessed, but I simply don't hear them that way. To my ears they are as extended and detailed as the TF10's, but with better layering and a more 3D sound space.