I have actually auditioned the new C1 Mark II, though not in my system. While the comment that this new version sounds clearer and more open at low to moderate volume, I doubt it will give me the raw uncolored tonality I now seek. I really want to go a different direction, I have heard Sonus Fabre, Spendor and Harbeth top line models (own P3 myself), while these speakers have strengths, this is NOT what I seek.
Hessec, your comments reinforced the V2 as one of my top candidate. Raidho, ATC, Vapor Cirrus all not available where I am, and I prefer to purchase something that has local support. Tidal is another brand that came up in my search, but again no local reseller. So it is still the V2 and Diablo in the running.