I have got myself a CX 180.
My first Sennheiser. When I first used them, they sounded like crap. I was kicking myself for blindly choosing a Sennheiser. I even doubted them to be a fake OEM ones.
But as the days passed by, these have run in so well. Now, they sound really good....damn good...
In my experience so far with the earphones I 've used
EP630 entry level,clear highs and nothing else,muddy bass
PL30 clear through out the range, even bass is so clearly defined but on the lower side, sound staging is better.
CX180 not as clear as PL30, but Bass I like just perfect! what i exactly wanted. highs and mids can be better....