for headphones
Audio Technica ATH M50 $150
Beyerdynamic DT770 80ohm $260
Sennehiser HD 598 $380
Consider price range, sound staging, open or closed backs.
This will be dictated by type of use, and where you use them.
m50 is your best budget buy, the other two are good reference points and a quick google can find you comparable cans.