Considering the fine amp and speakers you have, you deserve better than bottom shelf gear with what are very likely counterfeit parts. I say look at a real pre from a company that's a known entity. It never pays to buy cheap.
Preamp question - Cary Clone
I'm thinking about getting back in after retirement.
My current setup is the Vandersteen 2Ce's (mid 90's), McCormack 0.5, reworked by McCormack, (mid-2000's) and a Marantz CD player. The linestage is one that I designed and built myself. It essentially is a high input Z and low output Z, zero gain. It's the weakest link in the system, so I thought I'd start with that.
I have no idea where I'll end up with the system, but streaming and DAC's will be all new to me. At this point, I'm not looking to replace the speakers and amp until I've a different preamp and streaming capability. I like the tube preamp sound, but I'm not married to it. In my early search for a preamp, I ran across this Cary clone. Being not sure about the direction I'll take, I'm curious if anyone has experience with one of these, and would it be an inexpensive way to start to put the system together. It's inexpensive enough, but I'm not that interested in something not better than what I have. Here's a link to one of those.
HiFi Remote Control 12AU7/ECC82 Tube Preamplifier Refer US CARY-SLP90 Circuit | eBay