Primare i21 vs. Simaudio Moon i-1

Does anyone have an opinion as to which of these integrated amps is preferable? I'm driving Vienna Acoustics Bach Grands and I listen to rock, soul, jazz, etc. I've heard the Moon i-1 and I love it, but my speakers are fairly power hungry and tend to do better with more powerful amps. I've heard that Primare amps pair very well with Vienna Acoustics speakers and I wonder if maybe the slightly more powerful i21 might be a better fit. Does anyone have experience with either of these integrateds? Or better yet, both?
Ask Patrick Butler (he is the VA rep) on the Vienna Acoustics avsforum. He used the i21 himself but also recommendeds the i-1
btw, what did you finally go with?