This!
This is a Hovland HP-100 preamp. To over-simplify things, there are two types of tube preamps, the kind that appeals to the audiophile side of you, and then the one where you just like to sit, relax, and listen to music because it sounds warm, has a full sound, inviting, and takes the edge off music. This Hovland is the latter. If you want ultra detail & speed, that'd be Audio Research. I have one of these Hovland pre's and it plays well with my solid state amps from Pass, Esoteric and Audio Research. Lastly, be sure you use a good power cord, like a Shunyata Python CX or Zitron, or even better yet, a Anaconda CX/Zitron. If you got the bucks for the newer Alpha V2 or even better Sigma V2 power cords, those are something else. One of these cords plugged into my AQ Niagara 7000 really makes a nice difference.