Easy: VTL Siegfried Reference Monoblocks.
I have never, ever heard another amp do what those things did at an open house at my local High End shop. The next year I went to the same hi-fi show and heard the same turntable and disc player into the same speakers, but it was the Ayre preamp and amp instead. The Ayres are very nice, but they weren't even close.
Disclaimer: I've never heard the top line Halcro monoblocks.