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.