I can't say that I have experience of either, but I do own a pair of Shure E4c earbuds, which I picked up for a bargain $199 about a year ago. From the reviews, I suspect the SE310s are very similar, in which case don't hesitate. The sound quality of my Shures is superb - natural with no artificial extras (very important as I listen to classical music). What's even better is that they isolate outside sounds extremely efficiently. I use these on flights and when outside and they work hugely better than the Sennheiser noise-cancelling earphones I had before.