I have the M500's and upgraded from Sophia mess to the Takatsuki TA-300B. Very nice upgrade. I went further with the Takatsuki TA-274B, which was also very nice.
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Analog : ZYX Universe II X/SB2, headshell-to-phono Aural Harmony DeepSpace (cyro graphene gold) tonearm wire, Origin Live Enterprice-C MK4 tonearm w/ Silver Hybrid S2 wiring, Micro Seiki/Sound House SH-B19, Aesthetix IO Signature w/ dual power units, lots of NOS tubes
Digital/Pre-amp : Laufer Teknik MP64-14 (coming MP64-32)
Preamp : (coming Melos MA333+Phono w/ upgraded caps/wiring/umbilical cords by Mark Porzilli)
Amps : Canary Audio M500 w/ Takatsuki TA300B & TA-274B tubes
Speakers : Quintessence Acoustics Summit
Cabling : Synergistic Research Tesla Apex XLR / RCA / Speaker
Power : BrickWall PW2R15, Isoclean PT-3030G II & P106 II, BMI Oceanic Evolution Rhodium PC’s, Chinese silver wire PC’s (custom: graphene, NCF plugs)
Shelves : audiophilevibrationcontrol.com
Room : 20’x20’