The right decision depends on your tastes, there are some good headphones for less than 100 on the internet. All good ones, with pros and cons, but often very different.
Grado sr80i ...................... 99 dollars - Amazon
Grado sr60i ...................... 79 dollars - Amazon
(open design, clear sound, good entry to audiophiles headphones)
Beyerdynamic Dtx 501p...............99 dollars - Amazon
(closed design, portability, small size, ideal for public places, really good sound)
Phillips Uptown......91 dollars - Amazon
(closed design, good looking, very big and confortable cups, quite dark sound at least for me)
Beyerdynamic DT235 is said to be one of the best value cost-product
Only 46 dollars - Amazon
(They are not handsome but for home use, who cares...)
If I were you, a pair of Grado's would be my choice. But that is just my opinion based in my tastes.
Greetings from Argentina!