I am close with Vlad and have heard his Linea preamp. I demoed a broken-in unit at my house over the weekend. It is incredibly good for its price point. It is very musical, natural sounding, and soulful. It does not have the imaging precision and solidity of the preamp stage in my $38.5K reference T+A SDV 3100 HV, nor does it have the sense of space and detail due to having a softer top end than the T+A. But if I would pick the unit over a number of other tube preamps, of which I’ve personally owned a number, including the Viva Linea, Modwright LS-36.5 DM, PS Audio BHK preamp and many others. I wouldn’t hesitate to place it in the same sonic league as any of those.
If you can live with its constraints, I highly recommend it. What constraints? Three stereo inputs maximum, one stereo pair outputs, all single-ended / unbalanced. It is a purist preamp, so if you have subwoofers, for example, you would need to get a y-block connector for the RCA outs.