I see you ended up with the Torus! Did you manage to get that "after midnight" sound quality all day long now?
I'm a fellow Diablo 300 owner running Nola KO's and Rythmik subs and a Holo Audio DAC.
Currently running no power filtering because I thought Gryphon recommended against doing so. I'm running everything from a simple Shunyata PS8 connected to the wall with an NR-V10 power cable, and everything sounds great. But of course, I don't know what I don't know!
I'm very curious which upgrades unlocked the most performance from you Gryphon Diablo!