Realitycables.com is well worth checking. The name for this brand is very well chosen, and have used with pleasure between both tube and solid state preamps and amps for more than a decade.
Another excellent brand is named Auricle Audio Design (Auricleaudio.com). Also has stood the test of time in my systems.
You can enjoy the illusion of a physically present performance which is always great fun.
And you can speak to these designer-manufacturers if any question.