The CAT tube amps have tremendous synergy with Wilson speakers. In fact, the guys at Innovative in Manhattan said that the CAT monoblocks paired with X-1's yielded the best sound they have ever gotten out of a two-channel system. That said, and while they are unusually well built, those amps can be quite finnicky, and expensive, to own - they require very carefully vetted output tubes, which CAT charges outrageous prices for, for reliable operation due to the hot-rodded circuit. Both the monoblock and stereo versions of the amp can found for less than $10,000 used. I believe a new stereo amp (the JL-2) goes for +/- $14,000 new.
