How does the Westone 4R compare with the ones mentioned here?

I've had a pair of Shure SE115 for several years now, and I no longer find the sound satisfying ever since I got the HD598. I'm a big fan of the sound stage, instrument separation, and general detail of the HD598, which the SE115 lacks in every way. I realize it's hard for an IEM to compete with...

I'm looking for a pair of over-ear phones to use at work that is comfortable to wear over extended periods of time, and the HD-598 seems to fit the bill in terms of sound quality (from what I've read anyway) and affordability. The only issue that I can see is sound leakage from the open-back...