Funny you mentioned Lampi because that’s exactly why I asked about tubes as Lampi DACs have a rep for having a huge, voluminous 3D soundstage. Then I’m thinking you want a preamp that can just convey all that goodness without either squelching it nor overdoing it to make things overly ripe, and the Backert Rhumba Extreme 1.4 came to mind as it also throws a big stage but won’t overly color things, and the tubes last forever. Last, I’d hop on this Innuos Pulsar streamer that incorporates Innuos’ latest thinking and technology and comes with their Sense app that gets top reviews for both sound and usability, which puts it in pretty rare air as many others are compromised in one way or another. Here’s a pristine used unit that’s 31% or $2500 off the $8k retail price. Cha CHING!
https://www.usaudiomart.com/details/650067155-innuos-pulsar-streamer/
And you’re right — I did have a lotta fun with this and hope it’s at least somewhat useful. Best of luck in your quest!