Mccormack DNA-1 Rev. B or DNA 225

Which one would you buy to power some Dynaudio 1.3 MK II's? Can any of you detail your experience with this/these amp(s). Why would you choose one over the other? I use an Audio Research SP16L preamp and Myryad MDP 500 G6 processor. Thanks for your input.
I have not used a Rev.B but I found the Rev.A DNA-1 a bit warmer than the DNA225. Conversely, the DNA225 was a bit more incisive. So, it really depends on what you want/need.