Software EQ kills it. I rely entirely on equipment and keeping things as hardware as possible. I'm just different that way, not saying that EQ is a bad thing. I just couldn't get good matching with the W4. The W4 didn't have the bass like the PFE232, treble, musicality, and the flexibility. The mids were good, not great (on both IEMs). If you want a linear IEM, why not go ER-4S? I can't think of anything else that gets the job done. Why pay good money for a W4 to get "neutral" with EQ?
The etys don't work with my ears at all. I prefer not to use any eq either. I'm sort of a purist if you will, but I had better results eqing the 4r. However, I am one of the people who found the 232 sibilant under normal use. Why pay to get netural with eq? Because it is the only iem i've used that requires very little eq. Everything else, and I mean everything, that I've tried is far from neutral. :-/ I probably won't have the w4 forever, but until i find something better, it is the best overall i've found. I would honestly say neither are worth the price, except that there is nothing as good as them. ha. So in that sense they are. But they should both cost no more than $300 in my opinion. But I can't listen to many of the lower iems. I actually just ordered an over-ear hd600. We'll see how that compares. :)