Next step: tube preamp or analog?

Room acoustics??

I am just going to ignore the equipment you listed and make the statement that many people, myself included, feel that the preamp is the most important piece of gear that you purchase and that a good decision here will pay great dividends as you build your system. To make a good decision on the preamp you need to make sure it mates well to your final choice of amp which needs to mate well with your final choice of speakers. I myself have found my nirvana with tubes but there are some awesome solids state preamp available and should not be ignored.

It isn't clear what your objective is. When you suggest "analog," to what do you refer? LP? Reel-to-reel? Cassette? FM?

Lps.  And yes add room acoustics to the list. In terms of objective, it is to achieve the next level of musical enjoyment.  I started putting a system together in Jan 2018 and the first few steps were obvious based on owning a few hundred cds and no lps.