I'm a massive supporter of the KPA -> Matrix GT1000FX -> Xitone 2x12. That combination slays everything else I've tried out there, and they're nearly bulletproof. Every single night onstage, the same sound and it feels larger than life. That amp is super fast, and Mick at Xitone builds the best feeling / sounding cabs out there. He's pretty genius. They feel like a fantastic 4x12, push a ton of air, and makes your right hand feel like a hammer.
That said, I'm sadly selling my power amp and cab due to some changes we're going through. Post here Matrix GT1000FX 1U + Xitone 2x12 FRFR cab available for sale