I use a pair of Audio Note AN-K in a similar application- but probably a smaller room (11X15). I've tried a variety of other bookshelf speakers (Spendor, Soliloquy, Reynaud), but the Audio Note has worked out the best for near wall placement. I drive them with a Jungson solid state amp- the K's don't necessarily need tubes.
If you can swing a small sub, something like the Gallo A'Diva or Duo might be what you are looking for in terms of transparency and soundstage.
If you can swing a small sub, something like the Gallo A'Diva or Duo might be what you are looking for in terms of transparency and soundstage.