Oh boy...I should not have jumped into this thread. I have the GR07BEs and I'm super happy with them, but the head-fi effect is always present and being a fan of Audio Technica in general made me order a pair of IM50s. Given their price point (and availability), they will probably be easier to replace if I ruin them at the gym. That is what I'm afraid of with my GR07s...I know they are still making the BEs, but I imagine that'll change in the future so finding a suitable gym headphone under 100 is imperative. Hopefully this one fits the bill. I'm fairly worried because it looks a bit like the SE215 which would not fit in my ear correctly. I have a feeling I'm going to have the same fit issue.
To those that have tried both, are they similar in terms of where the cable leaves the housing? That part rubbed on my ear and pulled it away from my head on the Shure, so hopefully it's slightly different. Fingers crossed.