I'm aware they are different, maybe I should have stated I am not at all very experienced in this field, and therefore not much idea as to what I would benefit from the most. (Hence why I'm asking on an audiophile forum, to get an expert opinion)

Hey guys, long time head fi browser first time poster here :)   I bought my first decent pair of headphones about 10 months ago ( AKG K550 ) and I'm looking to make a bit of an upgrade. Now, I don't want to spend hundreds of dollars here so a new pair of cans is out of question. What i'm...