Opinions on Quicksilver Valve Linestage Preamp


Anyone with first hand experience with is tube preamp? Considering this preamp as a possible upgrade from my NAD C165BEE but I’d like to be sure that it’ll be a real upgrade. I honestly think the NAD piece sounds quite decent but hear too much about how a tube preamp will add to the musicality, etc. FWIW, they are both priced at $1K mark. It’ll be feeding my hybrid Vincent SP331 amp and the specs suggest they should be a good match.

Edited to add one more option in that general price range: Sonic Frontiers Pre 1L Tube Preamp .

Thanks.
128x128kalali
Thanks for the input. Both of these components are very reasonably priced in the used market and seem like great opportunities to jump in to explore a tube preamplifier in the system. QS tube amplifiers certainly have a great reputation.
There's no such thing as a Sonic Frontiers Pre 1L. Are you sure its not an SFL1? If it's an SFL1, I would definitely take it over the NAD or QS.
The SF model is advertised as an Anthem brand supposedly "made by" SF. Not sure what that means.
Anthem is a different brand. It was owned by SF but the products are completely different. I would go with the QS over an Anthem. 
Owned the QS and the 165BEE.  I am going to say a QS will sound different but not necessarily better.  I did not have the 6922 version, the older one was 12ax7 based if I recall and it was nice but not the smoothest upper mids/lower treble.  I replaced it with a AES/Cary AE3 DJH which was better bigly.