While waiting for shipping I modified the HD 58X by removing the pads for a wider sound stage, that actually made it sounds better. After the Fiio K3 and the Dac X6 arrived, I decided to keep the K3 after using them for over a day constantly. it just look better, smaller, and that bass boost is really nice. Back to the headphones, the HD 58X is flatter (as we already know) and probably is what the sound should be like, but I personally like the bass boost + Cloud II over the bass boost + HD 58X. The HD 58X in the end doesn't really justify what I paid for in my opinion, but I like it enough to not sell it or return it for now. Maybe I'll come to understand it's value one day. But the K3 dac/amp combo is definitely worth it so Im happy with that.