I have had a pair of Focal Sopra No2's, like the Wilson's, have a tweeter that will bring out harshness in the electronics.
For nearly a year I've had a McIntosh C50/MC452 and have been extremely happy with that setup. This amp has the smoothness of a tube amp, but (to me) sounds faster and more precise, hardly "breaks a sweat" driving my speakers.
I've had the "hots" to swap out and try all sorts of other equipment, but not with the C50/MC452!