I've been enjoying both my Shure 840s and my DT 770 PROs for a while now, and they're great headphones to use while on my PC. However I simply have no portable solution that has great quality. Since I have no idea what would be a good portable source for my headphones, I come to ask here. The only thing of importance to me would be sound quality and capacity of the player. As of now I'm using my Nintendo DS... And I don't think it was meant for music, hah.
I'm also looking for a portable amp to go along with this setup if anyone has any idea for that as well. :)