New headphones...?

Hi, I've just (not so) recently broken my meizu headphones..so I'm wondering wich ones to buy now. I've kinda set myself a maximum of 70€ ;__; I know its not much but I still have other a bit ambicious plans this year.

I've looked around a bit and so far I've found a few that soun..eer... seem nice..for some silly reason the only store in my crazy town that still has decent headphones doesn't let anyone to try them on in store...so here i turn to you, people who have more exprience then I have pants. ((<= Ignore that last part))

Anyway my list of the ones I could find so far is the following:

Sennheiser: PX100/PX200
(Question ..whats actually the difference? is there any at all?)
AKG K450
AKG K416p
Koss KSC-75 ( Almost impossible to find here ;_
Are the 450's better then the 416's ?
Will my meizu M6 be able to survive these ones, without an amp or shuld i get a Fiio amp aswell?


Can anyone who has tried or owns these tell me how they are like ;.; ??
Or if you have any other ideas please tell, I'd love to hear them, just know im not willing to spend much more then 70moon$ on them


Thank in advance <3