Shadow of the Colossus' and Journey's OST were truly something else to me, the Chrono games are also up there too.  There's just something about the music of old-school JRPGs to me.   I hear Metal Gear Rising: Revengeance is good if your into heavy metal, though I like everything.  

So DACs would be need if I wanted to use said headphones on a PC?

Are DACs a must to power the HE-500 and HE-6? 

How do the HE-500s fair on the competitive scale and immersion?   Its a toss top between this and the K702 annies (assuming a Cardas fat pipe comes out for it, or if you can use the old one) for me.