You may consider Harbeth. I had the DNA-1 Rev. A powering the M30's. Very well balanced from top to bottom, and a smooth midrange. It's a combo that's very hard to beat at this price, especially for vocals and jazz.
Also, there are still additional upgrades offered by Steve for the DNAs, he may be able to better advise on the sonic virtues of each. btw, I found the DNA-1 Rev A t be on the warm side, which mated well with the M30 monitors. My pre-amp was a MAP-1 at the time.
Good luck.
Peter