I would agree with Alexs2.
i have had my Etymotic ER4P earphones for about 2 Months now. I am still amazed with the sound these produce. I enjoy the noise isolation, you can listen at a much lower volume level, and you hear all the detail in the music.
I tried my Ipod ear buds again while taking the dog for a walk, the external traffic noise drowned out the music. With the ety's I can listen to quiet music and hear every note and instrument.
I was lucky I managed to get a correct fit from day one, and I find them comfortable.
There would be no way I could go back to normal bud type phones after using canalphones.