85 to 100 is plenty on the Vega for usage.
An Active Preamp is a must. I agree whole heartedly with Srajan Ebaen from 6moons:
"Swapping in my new Nagra Jazz preamp in 0dB gain mode with the Vega back at 100 became decidedly more dimensional, billowy, fluid and embodied. This demonstrated in completely unambiguous terms how despite fancy numbers magic, a truly superior preamp still retained a very significant advantage. At even lower levels (-70 to -80dB) the contrast was painful. Going DAC-direct sounded stripped, stark and flat. Audible space and all its connective tissue had collapsed and all prior tonal and textural elegance abandoned. Whilst theory would beg to differ, the age of preamps hasn't expired yet".
I think the CSP3 is even one step better via voltage output adjustment and with my Master and Commander Input Tube (Telefunken~see signature~below). Of course, cabling matters too. If you're not running the right combination of silver an copper. If you're running cheap horse hockey....then you would not have a clue about the Vega.
The fact that the case of the PS is cheap~still stands. I agree with you whole heartedly....if you paid more than 4k for the DS....you got suckered. ;D

Listening Room:
Room Treatments from Michael Green & Home Brew
Sony as Transport (DVP-NS57P)/Sandwich weighted for Isolation
Illuminati D-60 Digital Coax IC
~AURALiC Vega D/A processor~
1.5 MHz PCM....in Filter Mode 4 with FEMTO EXACT Clock in from Transport. She's a keeper!
Sometimes I use Filter Mode 1.....for flatter extended Treble.
Decware ZDSD DAC / Recorder (@ -20 Ref Level @ 16/176.4)
(.....will be sometimes rotated in~great machine)
WBT-0102Ag RCA Kimber Select KS1030
Decware CSP3 w/Jupiter Caps (NOS/Platinum/Telefunken 6922/E88CC .....for Input Tube)
WBT-0102Ag RCA Kimber Select KS1030
Decware Zen Mystery Amplifier
***NOS/Platinum/Ediswan's CV2492/6922 in my A12 an B12 positions***
Kimber Select KS3033 Speaker Cable
Acoustic Zen Adagio - Black Pearl (Modified)
REL T5 SUB, Neutrik connection from ZMA
Auralex Subdude II
Acoustic Zen Adagio's x-over's Modified/Full Range with Mundorf MCap Supremes-single Cap to each Tweeter/4.5k cross
(Gutted: 3kHz/18dB/Octave, Linkwitz/Riley Crossovers....with all crappy parts = gone)
XLO Pro Power Cords to CSP3 an ZMA
PS Audio P3 Power Plant / Pangea AC-9SE from wall to P3
(Transport, Auralic Vega or ZDSD an CSP3, Regenerated/120 ~ Multiwave off...ZMA on High Current Output)