@soix
the Don Sachs preamps are Tubes 4 hifi SP14 v23-k1 essentially with his take on cosmetic enhancements and some upgraded parts. I'm running one in my system (not the Don Sachs version) and had all the upgraded parts available swapped in for the standard. If you build this yourself, it starts around $800, or assembled for $1100. These are really nice, but bare bones, no XLR in or out, remote controls volume and dims display, but they now have a newer version of the kit with OLED display for $2100 assembled. Probably can't beat this preamp for the money you are spending.