as a former C5 owner, I have owned more than 1 pair of C5, I will caution your move.
I don't need to tell you about C5 strength, but I wonder if you have squeezed out the last bit of C5 strength yet. what are you using for amp? C5 are hard to drive, but if you feed them with high current amps, they sing very nicely.
I have owned some ProAc (D15 & R3.8), have heard some Harbeth, they are very different from most of Dynaudio and even further from C5. among them, I prefer C5 over others but my love for tube forced me to sell the C5. I am happier with tube + other speakers, I found C5 performance can be reproduced or better by other speakers in similar price point.
I don't need to tell you about C5 strength, but I wonder if you have squeezed out the last bit of C5 strength yet. what are you using for amp? C5 are hard to drive, but if you feed them with high current amps, they sing very nicely.
I have owned some ProAc (D15 & R3.8), have heard some Harbeth, they are very different from most of Dynaudio and even further from C5. among them, I prefer C5 over others but my love for tube forced me to sell the C5. I am happier with tube + other speakers, I found C5 performance can be reproduced or better by other speakers in similar price point.