For a $500 MM (or lesser) you may want to consider the Ortofon M20 FL Super a very sought after MM. I own the both the MP-500 and M20 (have yet to install it yet though) I don't have an abundance of experience with cartridges having only owned a Dynavector DV-20X,Denon 103 in a Panzerhoz body,and the MP-500,with which I have spent the most time with.Initially the Nagaoka was mounted on a Origin Live Silver which at the time was VERY,VERY Good... now I have it mounted on a Phantom that after spending much time with damping fluid,VTF and anti-skate,,,, now SINGS! with so much more resolution and detail retrieval,,, Vinyladdict sums it up quite nicely it is "...luxurious and romantic sounding. It is rich in the midrange and throws a wide holographic soundstage."I can totally agree with that summation after having it mounted in both arms. The Graham having much more control and precision allowing it to strut its stuff.Most people wouldn't use a cartridge of this caliber with an arm such as the Graham but as ancilliary equipment becomes more stable and reined,so does the MP-500's. There is a 'Gon member that compares the MP-50 (a lesser refined predecessor) to both his Allaerts LoMC carts when also mated to a Phantom.
regarding the compliance,referring to the white papers included with the cartridge does in fact list it at 8.5cu,does not state dynamic or static.
In short it is a very good cart, that will shine in Rega based arms.Lastly I have found it to be a much better performer when the VTA is dialed in.