To be honest most of the DACs out there are based around sabre or burr brown chips and your just paying for a fancy box or Name! The Pi strips away all the bullshit literally and your left with what matters implemented well and those guys at Allo are obsessed with getting the best sound possible out of the Pi with their gear. Ok the top manufacturers are maybe giving you a better PSU but as you have found there are some cheap as cheats linear supplies out there that do the trick!
VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2
Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
Digital: Raspberry Pi 3+ With Allo Boss.
Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
Speakers: Pioneer CS-77A
Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
Digital: Raspberry Pi 3+ With Allo Boss.
Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
Speakers: Pioneer CS-77A
Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
Digital: Raspberry Pi 3+ With Allo Boss.
Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
Cables: SPOTFIRE Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
Speakers: Pioneer CS-77A