This is a very interesting question and I'd love to answer it. I've had a JH5 for about 4 years, and only recently heard the pistons. I'm not sure about the others, but I usually ignore universals unless something cool pops up. By cool I mean like Dita Audio or Shure 846 kinda territory. So when...

I've have both the SM64 and W40, and I'll recommend the W40. The SM64 is so poorly built and awkward to wear that I hardly reach for it.

I use mine with a DX50, really love the pairing.

  I've used mine daily for slightly over a year. No problems so far.

I'm getting confused by the number of heavens...

  That sucks, absolutely can't wait to get my hands on a T10i. Having used plasticy custom monitors for years, I'm craving some solid metal earphones.