Looking for a new pair of headphones

[Evnoir]

To sum up the 3 headphones that you posted really briefly (in my opinion):

HD280 - Pros: Sturdy, good isolation
Cons: Lacks bass punch, sounds 'crunched'

SR60 - Pros: Very engaging, forward mids, comfortable
Cons: Not neutral at all, slightly lacks bass quantity

XB500 - Pros: Heavy bass (Could be a con), super comfy
Cons: Muffled/muddy, V-shape frequency response


One commonly recommended headphone for that price range is the Audio Technica ATH-M50. Have a look at those too.

Edit: Please don't get Bose...