Interesting that the ML 380S came up as one of the recommendations. I auditioned one in my main system a year ago--a local vendor was kind enough to loan his 380S for the weekend.
Listening to the 380S for an evening plus two full days reminded me of the pair of Cardas Golden Cross balanced ICs I took in trade for an old New York Audio Labs phono stage.
In both cases my strongest impression was a striking loss of high frequency information. The Cardas was the worse of the two offenders, but the Levinson changed my system in a similar way. Even my teen-aged daughter, with whom I share a taste for some music (e.g., Steely Dan's old radio hit, "Do It Again"), and who was over that weekend, noticed the change.
I had thought the 380S would be my last preamp, but I was very glad to return it, get my money back, and put the BP26 back in the system.
In any case, I appreciate the comments. The search continues. . .