The second best horn system i ever heard in my life was the VOTT set-up by Jean Hiraga in the dedicated room (in Lille, France) .
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This is what he uses as amplifier:
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And this is his custom made DAC (with integrated volume control): bottom left you can see what he always uses as a source (TEAC DV-50)
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Sound was utterly realistic, those shiny CD's revealed an amount of information as if we were listening to their master tape!
It is not a 5k system I must admit, because the parts he uses are very sought after. But when it all comes together as Mr Hiraga does, it is an absolute no-brainer and first choice, if you have a room suited for it. I think you need a room about 100 m³ to let such system sing its songs...