I think the Musical Fidelity A3cr preamp is tough to beat.
Beautiful appearance, remote, dual mono power with choke regulation. Soundstage reviewers choice 2000, class B Stereophile, check soundstage.com review.
I own one and only change I would make is to add balance control, but all preamps I owned previously had no balance also. Sound wise I have no desire to try anything else,
smooth yet dynamic with clear clean treble.
Also check sam tellig review in 10/2000 Stereophile, Audio Advisor offers 30 day trail, has demos for $1295.