I had the Etymotic ER4S several years ago, and found them excellent in sound quality, but too uncomfortable to wear for extended periods of time. I've recently been working in noisy environments, so I would now like to re-explore the world of IEMs. Ideally, I'd like something that can approximate the sound of the HD600s, but I realize that may be impossible.
I did a bit of research, and narrowed my options down to the Shure SE535 and the Westone W40. Comfort and musicality are essential. Would appreciate advice and opinions on deciding between these two. I'm open to other suggestions, but would like to stick to the ~$500 price range.