So, what does make T51 such a unique and relevant music (and video) player after all ?    The combination of :   * Great SQ  (on the bright side - very detailed, HUGE sound stage, lots of air and space, punchy and dry). * Thy on-boar amping (drives even 600 ohm Bayerdynamics), * proper size, proper battery life (10 hours measured), proper design and usability (memory card slot, lineout, volume wheel) * good, affordable  price.    This small DAP may give you lots of SQ when properly used, even stock (not modded) .   After some...