Best upgrade from hd 558 with a $170 budget?

[BananaMcGee]

I had my birthday yesterday and got some spending money from my grandparents and wanted to upgrade my headphones. I already have an amp, so I just need straight up headphone suggestions.

 

[celibate]

I myself was planning to get a pair of AKG K701; since a pair of them sells for about just about under your budget on amazon you might want to check them out.

 

[Mad Max]

Consider a used K701.
Or a used K702 if you want a detachable cable.