Graham / Chartwell
The new Chartwell LS3/5a by Graham Audio is simply one of the most amazing speakers we've ever heard. Judge for yourself. The bass response and detailed mids are unbelievable especially for a 12 inch tall speaker. These can be stand-mounted (custom GHA 12 inch stands like the ones in the picture above) or can be placed inside a bookshelf (since they are a closed cabinet). Graham also makes the incomparable LS5/8 and the Chartwell LS5/9 speakers. This is BBC sound reproduction at its finest. This is what you're looking for.