The Eastern Electric Avant pre-amp, particularly with an NOS rectifier tube and discreet op amps is a excellent and low-cost preamp. Not the best that I have heard, but you didn't list a price range.
If price is no object, ask Frank Van Alstine to build you a custom, one-off, fully discreet, hybrid preamp.
If price is no object, ask Frank Van Alstine to build you a custom, one-off, fully discreet, hybrid preamp.