Lightning quick DYNAMIC amp in the under $1000 range

for just a bit more scratch $ and not for big bad poweramps, but the LiL Kimber PK-10 w Wattgate components is lovely sounding....can be found used under $130 ish....

I use one on Lampizator DAC

I own the STA200 and imo, there is not much a better amp suited for a passive pre. For giggles, I hooked my SYS to it directly, plus my Pro-Ject Prebox s2, and the sound was fantastic and quiet. I do prefer my RP-5 which seems to add a little bit of warmth and 3d (just a smidge). 

I'm curious about the Vidar. Plus, the Class D PS Audio Stellars

aberyclark, just to be clear, did you use the Prebox s2 directly into the STA200, without SYS? I am asking as I thought about purchasing the prebox to use directly  with my STA200. Thanks.

Class D Audio. High power, great price!
https://classdaudio.com/class-d-amplifiers/sds-audio-amplifiers.html