Vandersteen. The 3a Signatures grace Ayre's soundroom and match their equipment wonderfully.
One of Ayre's primary goals is to not disturb the phase and time issues going through their electronics( by eliminating feedback.)It would makes sense that a time and phase correct speaker complete the picture.
I'm sure other speakers will also work well.
I personally use the 3a Signatures with a V5xe, Aesthetix Calypso preamp and Audioquest wire throughout. It makes music and to me, that's what it is all about.