As you bring in the ie8, though author of this thread asked nothing about it, ill comment on all three. As I've previously tried and owned all 3.
In fear of repeating myself, I will keep it short.
In a matter of sound quality and personality the ie8 is abit more open, it has good clarity, but for me it was no good with fit and isolation.
Triple.fi 10 pro has a nice sound signature representing the whole spectre good enough for me, but they are big, and will be sticking uncomfortably far out of your ears, even with the flip-flop mod..
For me, in cold norway it was not an option to use these, atleast not during winter..
W3 has good sound quality/signature, and fits like a welltailored glove, some users experience sibilance, most due to tips and wrong positioning(it is assumed to be so anyways), majorly the sibilance issue is not present.
The w3 might seem a little flat(neutral), where the ie8 is dark, and the triple.fi abit high.. For me atleast.
Good luck deciding!