Just over a year ago I heard a system with a pair of the Reference Signature S8's on the end of it. It had a Light Harmonics Da Vinci DAC at the front end, a JE Audio Pre-amp, and was driven by a pair of Anthem Class D Statement Monoblocs.
The session was helped by the fact that the demonstrator avoided plinky plonky Jazz, and played a lot of my kind of music - mainly hard rock/heavy metal!
I wouldn't claim to have either the best ears or the widest of listening experiences. But.. I've been to a few shows and dealer musical evenings and this system hit the spot for like no other I've heard, including ones that would have cost twice its price. The speakers obviously played their part!