The IE8 are great with my ALO Amphora amp, and opamp rolled D10, but not with my iPhone or Nano. So I found someone to trade my IE8 for their W3 here at RMAF meet, and since I lost my W3 I think I'm going to do it. I could go for his UM3X which are technically just a little better than the W3, but I already have ES3X customs and I don't think I need a universal IEM that sounds similar to the ES3X - I like to change up the "flavor" every once in a while.
While the UM3X are maybe more accurate, the W3 are a little more fun or exciting sounding to me (but more accurate if used with my UM56 custom tips). With the IE8, I just feel more limited because of the narrower selection of amps that wake them up and make them sing. If these would be my only IEM, or if I was having sibilance issues with the W3 then I'd probably go for the UM3X though. Just an FYI.
I'll probably unsubscribe from this thread soon if the swap goes through.