Been doing a lot of reading the last couple days but still can't narrow down things. I've been thinking of getting a dedicated set of full size headphones for listening. Right now my setup is my PC with an HT Omega Claro soundcard which has a built in headphone amp (up to 600ohm) with swappable opamps though I haven't changed out the stock ones. Music is a combination of lossless rips of my CD's and music purchases through Microsoft's old Zune subscription service which means a combination of mp3's (256k I believe) and a few odd .wma's depending on the artist. Right now I'm listening with a Sennheiser PC-350 headset (150ohm).
So far I've been looking at either the Beyer DT770 or DT880, Audio Technica AD900x, and because I've liked my Sennheiser PC-350 so far I was wondering about the HD558 or 598. I definitely need over the ear circumaural style. I can NOT wear on the ear style. My left ear sticks out a little more than the right and for whatever reason gets really sore after just 10-15 minutes of wearing an on ear style headphone on it.
The music I listen to mainly is hard rock & heavy metal with bands like Metallica, Megadeth, In Flames, Black Label Society, Five Finger Death Punch, Halestorm. Also occasionally I'll throw in some Motorhead, ZZ Top, Joe Satriani, and something crazy like some BB King or Stevie Ray Vaughn style stuff. I plan to continue using the PC with the HT Omega as a headphone amp for now, but at some point I need to replace the PC (going on 4 years old) and new boards won't support the HT Omega. I think for the price of replacing it with their newer cards that will work in a new PC I will instead probably end up with the Schiit Magni/Modi combo.