NUC 7i5BNH with 8gb RAM, 256gb M.2 and 1tb internal SSD. 51k tracks, no DSP used (I think native sounds best).
I did recently go from an external OWC 2.5" external USB 3.0 HD to an internal WD Blue SSD HD, and the internal SSD sounds better and is snappier in performance, imo.