Razy1991 :
What do you think about the Beyerdynamic DT770 PRO?
I know I'm not the one you responded to, but I owned the ATH M50s for some time, and I currently have the DT 770s right now. The 770s are more "punchy" with their sound which makes them more "fun". I also think the audio has more depth when compared to the ATH M50s. Keep in mind the DT770s are more expensive than the ATH M50s, so for the extra money you get slightly better sound, but much better build quality. You cant go wrong with either pair.
One think to keep in mind with the 770s is, where will you be plugging them into? They come in 32ohm 80ohm and 250ohm variants. If you go for anything other than the 32ohm, you should plug them into an amp. I have the 32ohm and they sound great without an amp. More ohms doesnt mean better sound, just a different sound.
Overall, you spend more, you get more. If you wanna save money, go with the ATH M50s. If you are willing to spend a little more, the DT 770s will give you a little more.