Brian,
The 70W output of the Prima Luna HP is insufficient to hear what is possible from the Focus 140s. I owned a pair of the 140s when they were first released a few years back. Dynaudio specs state power handling as 200W. Give them at least 150W-200W and you may very well find a new appreciation for and enjoyment of them. If you are dead set on keeping the Prima Luna the you can do better than the Heresy's. I have heard them, can't remember the amplification, and they sounded overly revealing to the point of being fatiguing, especially at higher volumes.