Since no one else is responding, I'll pass on my limited knowledge. I became aware of Eximus at CES 05 when one of the best sounding rooms at that show was using all Eximus electronics with DALI Megaline speakers. Another room that sounded very good was using a complete stack of Eximus with some very boutiquey hand crafted metal speakers. I spoke with one of the Eximus / Stello people and he was concerned about providing value to the high-end world. He expressed concern that if manufacturers didn't get realistic about their prices,m the high end would disappear.
One thing that wasn't clear to me was if there was any difference between Stello and Eximus gear other than the fancy casework.
Limited info, I know, but it's all I have.