Hi guys, I have a Sansui au 417 fully restored with a Tannoy mercury v1i connected to pc with a Asus xonar DX (cirrus logic cs4398). Now my trouble is... I can buy a cambridge dacmagic 100 or probably with lucky a Arcam rdac or change my amplifier for a Sansui AU alpha 607 Extra. I like the detailed sound and the midrange quality. Which is the best way for me? Thanks!