so I should just go with a used 598 for the best value?

How much will they release it for?

I've looked at the hd598. Is there a big difference between the hd600 and 598 that would warrant the price difference. And which sounds better without an amp? Also took a look at the akg q 701, would that sound good with the music I'll be listening to? Thanks in advance!

Hi, I'm really excited to get started with some nice sounding cups to replace my plebeian gaming headset (Logitech 930s). I went through the Headphone buying guide on this site, and was looking towards the mid-range - upper mid-range specifically. My budget is $150, a bit flexible because I'll...