Are you sure about that? No amount of expenditures on those things will ever make my Yamaha A-S801 (as good as it is) equal the sound reproduction capabilities of my Sansui AU-X1 driving my 805 D2s in the same room, level matched and at moderate volume (well within their respective capabilities), just sayin'...
Hearing the differences in realism of even something as subtle as the piano bench noises heard during the first few seconds of Mozart's Piano Sonata No. 11 in A Major ("Allla Turca") K. 331 (K 300i) on the Ivo Pogorelich recording would make that crystal clear to anyone that heard it side by side.