OP asked for flagship product to build around:
Luxman 509X. 65 lbs. of rakish Japanese amplification iron. One can feed it anything of great quality for source and it will caress the signal passing it on completely intact.
This integrated can well drive most any transducer on the planet. And....it's gorgeous! Audio crystal rarely matched, with its decidedly retro look, large room illuminating meters and solid Iowa-class battleship ruggedness.
My wife's system cobbled together until further refinement. Presently fed by a Rega Apollo, Mojo Audio Mystique' 3 DAC and driving old Mordant-Short MS 20i Pearl Edition speaks. Fun system, great lights, shiny.