I ended up buying the Westone W30 in ear monitors.
They sound wonderful.
I don't get on with in ear monitors, unless they're the made to measure type moulded to your ear canal. I had a pair of those on the bike in my motorcycling days and they were brilliant, and also did a good job of keeping out extraneous road noise.
But for home use, I prefer my Beyer DT100 headphones. They're incredibly comfortable to wear for long periods and have excellent response, although the DT150 version has better bass response.