Of current production SS preamps that you can find used, the top Lamm (it uses a tubed power supply, but is otherwise fully solid-state) or the preamp in the DCC2.
The Blowtorch is said to be supurb, but it exceeds your budget and I have never personally heard it. Ditto for the Burmester pre's.
The Spectral preamps can be incredible, but they are a different flavor that not everyone will like and have to be partnered very carefully with associated components and speakers.
If you can do without a remote and don't mind hi-fi geek aesthetics, the Lamm will outperform all but a handful of preamps, be they tube or solid-state.