I've only ever owned the Hope 4pot brakes. Not due to the extra power or modulation, but i like the look of them and i'm a tart
The Hope XC4s now on the Bonty were brilliant. Lots of people didn't get on with them due to heat build up/lack of power compared to C2s. The Pro lever is a great shape, better than the Mono lever IMO. I've never been hard on brakes and never had issues with the 150/130mm rotors.
I put the XC4s on the Bonty and bought Hope Mono4s for the Klein Palomino, later the Yeti. Nice, more powerful than the XC4, but the lever wasn't as nice. They seem abit more finicky to set up than the XC4, more rotor drag too. They are now on the Raven, the rear needs adjusting again come to think of it....
I've been running the Tech M4s for about a month or so now. Fab brakes, the best of the lot. Lever shape is spot on, lovely feel too. Lots of easy adjustment, plenty of power and they look bling
There has been a lot said about the lack of compatibility with shifters, they didn't fit with my M952 XTRs, so i threw money at the problem, they work fine with the latest XTR
Easy to set up too.
I've ridden the C2 and Mini/Mono Minis and they are fine, its just the fact i'm tart means i've never bought any. I know plenty of riders who are happy with them though