Back to the OP and another take on 'ultra high end' speakers if I may...
If looks aren't important (of yes they are in domestic high end as most subjective audiophiles seem to listen with all senses and especially their eyes!!! - imo obviously), then what about a proper pair of decent ACTIVE speakers from the usual suspects? No need for separate amps, the drivers are properly matched to the enclosures and amp packs driving them and technical performance is usually rather better than 'most' passive speakers I feel (with very few exceptions generally I'd suggest).
Just another avenue to pursue, especially as conventional audio dealers only have an interest in separate boxes and extremely profitable cables and other accessories, to be upgraded, bring more and more potential profit into the equation...