I'm looking for a replacement of my JVC HA-FXT90   My requirements: 1. Bass. I really enjoy the bass performance of JVC HA-FXT90. I listen to rock music usually. 2. Can be used with iPhone without AMP 3. I'm not planning to upgrade, just want another IEM in similar price   Any advice...

1) I'm a basshead, I want strong and deep bass 2) I want an IEM in small size, something likes Shure SE215 won't be my choice 3) My player is iPhone 4 without any amp   Thanks in advance!!!