I think Westone and Shure missed the boat.
I have not heard the 846 and I like the direction of going to a BIGGER sound versus UE900 and W4 going to a smaller sound but I think $1000 is too big a jump from $399 SE535.
I have real strong feelings about W3 and I think many here don't understand how ground-breaking it was when it was released with the 3-way crossover. It was the first universal with a BIG FULL HEAVY sound with amazing clarity and detail at the same time. No ther IEM could do that. I DO think that with silicone tips it does not sound right. Somewhat siblant, somewhat non-cohesive and a sucked out midrange. But I am blown away with P-series comply tips. I find midrange and vocals fantastic. I use a treble EQ boost and nothing more. Even unamped it's amazing with any music.
Having said that I think the next "improvement" with Westone is EITHER:
W4: Give it a fuller sound with better overall clarity.
W3: Tame down the mid-bass, leave sub-bass as is. Push midrange 10-15% more forward.
Price it at $599 list .....$450-$550 on the market.
As a side note.....I find it ironic the SE535 does NOT have a midrange driver....yet it's midrange is so forward and present (too much for many folks). Where W3 DOES have a dedicated midrange driver yet it's not very effective with silicone tips. Just shows how important tuning drivers is.
i too find that a interesting point.