Try a TVC passive. I have the K&K TVC using S&B transformers. There are a number of people here impressed with the Prometheus which is low cost and has a 30 day trial. Bent Audio also has a TVC model that is extremel good. Lots of options.
Audio Horizon Preamp
I've read glowing reviews from anonymous users about the audio horizon preamp. Unfortunately, we all know that some of these reviews may not even be real. Does anyone know if there are any audio publications that have tried this preamp. Surely, a preamp that's outperforming preamps at three times it's price should be drawing the attention of Stereophile and the like. Don't you think?