I think I'm going to go with the SE210s. I don't really take all that many many phone calls while at the gym and it looks like the I2C series may not work with the Curve right our the box after all.
Started some price shopping and I'm seeing SE210's and SE210-k's but I can't find out anywhere what the difference is. The Shure site doesn't even list the -K as an option. Anyone know the difference?