The McGrath/D'Agostino road show is in progress, recently performing here. Pairing electronics is so critical. I've only found Constellation amps capable of bringing out the best in Wilson speakers in all my years attending shows and at disappearing brick & mortar stores. That said, one of the key designers for the Constellation gear is the famed, Bascom King. Bascom was commissioned by PS Audio's Paul McGowen to build an amp, worthy of putting his name on. See youtube.com BHK Signature 300 Mono Amps that combine a tube front end with SS. Bascom, Paul and Arnie Nudell discuss the benefits of the design layout and build. Coincidently, i'm using the BHK amps with my VR55's to great effect. If you can find a dealer nearby, ck out the BHK amps/preamp, from PSAudio. Von Schweikert Audio speakers are Wilson/Magico killers!