Hello, I understand it is perhaps too much, I would love to discuss my 4 music kits: 1. Cowon Plenue D + Audinst AMP-HP (with Burson Audio) 2. Xduoo X10 + Xduoo XQ20 3. Shanling M0 + Topping NX3S 4. Zishan DSD (alone or + Little Bear B4 with Burson Audio) I am interested in sharing opinions...