It's an old post, but what about horn speakers? Not Avante Guard, so this narrows it down to DIY, vintage (Altec, Klipsch), or super spendy speakers like Shindo or Cesaro. So what about it - any experience with high efficiency speakers with Shindo amps? I have an Aurieges mated to an Haut Brion that are looking for playmates. Looking down the Altec 19 road for a temp solution until I can build horn speakers.