What would be the best closed back for a digital piano(Kawai ES 4) for under $500? I've searched everywhere but I couldn't really find any clear consensus. I've found the DT 1770 and Shure 1840 to be worthy of consideration. I heard the Focal Elegia should be considered if I can stretch my budget a little more.. What are your thoughts? I can also get the ZMF Eikons but I don't want to spend that much on a headphone that I'll mostly be using with my digital piano.