Hddg, that does sound like a good deal on the Gryphon Mephisto mono's. And no question they are great amps. Though I don't agree the Mephisto mono's are a grade superior to Gryphon. I can tell you, Vitus's factory is SOTA, and arguably superior to even Boulder. Virus designs his gear to achieve a sound which offers the best of SS, Class A, zero NFB design, with a natural/organic tube-like quality. He also designs his amps to be non-fatiguing.
Fyi, Vitus will be releasing new SM-103 mono's, probably by early next year based on the SS-103 stereo amp which should be around $60kEUR. Like the SS-103, they will operate in pure Class A with Zero NFB & feature Intelligent Class A bias' & two tunable modes 'Classic' and 'Rock'. They will absolutely compete with the Gryphon amps on any metric. Though I wouldn't pair Vitus monos with a tube preamp. Rule of thumb: Vitus sounds best with Vitus. Sound-wise, I think you'd find Vitus sounds more organic and tube-like compared to Gryphon, but still with PLENTY on control, speed and resolution. Just with a more natural presentation. Just another option to consider...