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Not much help on the Lector Zoe Preamp as I have never heard one. However the AR gear I am fairly up to speed one and if I was ever to return to tube gear I would look for the SP8 or if I had big bucks the SP10. Both would require service from AR at this stage of their life. I am just not a fan of tubes anymore. From 1957 to 1977 was knee deep in tube gear, just wore me out over those years as well as my wallet was getting thin in keeping a supply of back up tubes always on the ready. When Threshold and Levinson came along I was out of tube gear at damn near light speed. In fact more like warp factor nine and haven't looked back. I have no fond memories of any tube gear. Others on this post will dissagree, but for me tubes are not a memory I wish to revisit. But good luck in your search, I wish you the best.