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.
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.