I currently have the W4 and am considering upgrading to the PFE 232 and have also been looking at the new 132 for $239. It would be about $120 to exchange them. I'd love to get some thoughts but I really have to make a decision today. One thing I'm really interested in is the controls on the cable. I didn't think it would be a big deal but it is.
The 4's: I love the cables, they are very comfortable and I feel like they do all genres really well. I could use a little more bass or presence, perhaps but otherwise I've been fairly happy. I sometimes get the feeling that something is missing. I also have a pair of UM3X and they are way more sensitive than the 4's with my iPhone 4s and the size of the jack sucks. They are more exciting and I completely get the instrument seperation people have talked about. I think they could be a little fatiguing for long sessions or at least I see how they could be.
Thank you in advance!