Spent a few hours last night swapping tips and becoming very frustrated over the lack of highs, especially after reading most of the impressions here. Went through all of them and still couldn't bring the treble out.
So I decided to take the recommendations on modding the triflange. I trimmed the stem down considerably and turned it into a single flange. Modded, the Westone 3 sits flush with my ear and the single flange seals right at the entrance to my ear canal. I don't even have to play with it to attain a seal, just a very small twist and it seals. VOILA!!!!! The highs are there afterall!
Swapping back to the grey tips, silicon tips and complys and the highs disappear again.
With the newfound highs, I have to say they are very close in SQ to the UE11. The UE11 still has the edge in treble, though with the single flange on the 3 the gap is narrowed considerably. I prefer the bass on the 3, as I still stand by my opinion that the UE11's bass tends to drown out the subtle details in the midrange. Midrange is fairly equal, but I can pick out smaller details on the 3. The UE11 has a thicker sound, which is fun for some kinds of music, annoying for others. The lighter, airier sound of the 3 is better suited for all kinds of genres.