Here's what I am using right now -
https://www.stereophile.com/content/krell-kav-400xi-integrated-amplifier-measurements
I am not using the preamp, to my ear, using the HTR bypass and the volume control on my DAC sounds better. Like I mentioned, I love the sound of tubes and am trying to figure out the best way to integrate them into my system at a reasonable price point ($2-3000, used is fine). Ultimately, the goal is to reduce harshness in the highs and give more body to the mids. If there's a ss amp out there that would help achieve this I am all ears. Suggestions?