mini Vs are way better than the cantis I had on my CX bike.
I fettled with my cantis, put on koolstop pads, played with the straddle wire, consulted sheldon etc etc. Then, I put on a set of mini Vs and they were loads better without any adjustment and still using the standard pads that you would have thought were crap.
After using mini Vs I no longer see the need for cable discs on my CX.