Not sure if this will be of much help as I haven't heard any of the PMC range to make a comparison, but I have had the D2's for about 18 months now (bought, incidentally, from Unilet).
They are a fantastic speaker, quite revealing, with a pretty flat frequency response in my experience. Very easy to drive.
I have been using them with a Sonneteer Alabaster until last Sunday. I was pretty happy with that - the Alabaster/D2 combo is particularly sublime in the mid-range. Top end could get a little harsh on anything not well recorded. Bottom end was very good, if not as good as I felt it should be.
Then last Sunday I became the very lucky owner of a secondhand Sonneteer Orton. I've read lots of good things about the Orton, and was fairly confident it would beat the Alabaster when it came to taming the top end and adding a layer of refinement. But dropping from 55wpc (into 8 ohms) down to 33wpc made me wonder if the Orton would lose a little bit of oomph that would not be worth the price of that extra refinement.
I couldn't have been more wrong. The Orton/D2 combo is heavenly! Top-end is silky smooth, but the bottom end was what completely surprised me - the D2's really can go low. It's been a real revelation.
So, with the age-old caveat of "with the right amplification", the D2's are capable of being absolutely superb.