Agree with joey54, the AI 3 line stage preamp is tube, and will give you great sound in conjunction with a SS amp. Had AI preamps for 24 years between a 2D and 3A. If buying used gives you the willy's, buy one of AI's reconditioned ones that come up several times a year. They are about $200-300 more, but the tubes, and innards will look and be much like new.
Bob
Bob