kef ls50 wireless (simple one box system) if you buy new
used:
neumann kh120 + mytek brooklyn + sonore microrendu (simplicity, resale value)
magnepan mg12 + 2 crown xls 1500 mono blocks + Mytek Brooklyn Dac + sonore microrendu (for speed, coherence, resolution)
omega or tekton high efficiency speakers + coincident 34se + Mytek brooklyn + sonore microrendu (for immediacy, realism, imaging)
Room treatment and speaker positioning is essential (you won't get good performance with a BMW on sand or ice. You need a treated surface...)
solid core Cables are the best - they don't mess with timing. Dnm, VOVOX, clearday