I currently own 2 iems. The PL30 and the Brainwavz M1. I'm loving both of them. I can't listen to the KSC-75 because of the piercing treble. Now I'm looking to upgrade for them. The most important factor for me is comfort because I sleep in them and I have small ear canals. Sound should be similar to the PL30s and the M1s with smooth treble, no excessive bass and clear vocals where I can enjoy my pink floyd.
I looked into the MC5 but the comfort factor and how they stick out put me off. I also looked into the Re-zero but I don't I want to go with the adapter thing. HJE-900 has too much treble and bass. Custom-3 seemed pretty reasonable, but the wire put me off (specially because I don't live in the US and I can't claim warranty in my country).
What do you guys think is a decent upgrade? Budget is around $100