Can't decide if I should get these for my next headphone purchase, I'm looking at the Sennheiser HD598's or the Shure SRH940's...
Do the Shure's have good isolation and low/no sound leak? How are the lows, mids, and highs compared to the Sennheisers? And does it sound flat since it's a "reference" and "studio monitor" headphone?
I'd be using it with my iPhone 4 playing lossless files. Already have a Fiio E6 Amp and Fiio L9 LOD but could upgrade if it provides an increase in quality.
It sounds like you want some portability since you will be using it with an ipod. The HD598s are not meant for using unless you are sitting at a desk in a quiet area since they are open. The Shures seemed to isolate decently, and did not have much leakage that I can remember. Both are great, but the SRH940 really shines in the treble whereas the HD598is a bit more laidback. I would recommend the Shures unless you are planning to use them for long listening sessions, as they are a bit uncomfortable for extended periods of time.