I have a Panzerholtz plinth made by Albert Porter, and currently use an Acos Lustre arm with the DV20X-L and Aurum Acoustics electronics.
First, some background: a local audiophile and friend was here a couple of weeks ago with his stroboscopic Time Line TT speed analyzer, and we found my Technics MkIIa timing to be spot on. I have not had any update work performed (replacement of caps or other electronics, nor power cord conversion to IEC, for example), and still the TT speed is very accurate indeed.
Albert will suggest you have your MkII electronically reconditioned by Bill Thallman of Music Technology, and that you replace the Technics platter mat with a Micro Seiki CU-180 copper mat.
Albert's advice has always been accurate for me, but you and he may listen to different aspects of recorded performance, so --just as Peter recommends-- I suggest you contact Albert. He is very wise, steady, methodical and knowledgeable, and he is willing to share what he has learned.
The plinth he has designed is, to my eye, a work of art. I have the twin arm plinth in ebony and it is exquisite, in both line and execution. Start doing push-ups now so when it arrives you will be in shape to move it around. Mounting the Technics in the plinth was very straightforward, taking 45 minutes. (I am very careful with such a beautiful object) No special tools are necessary.
While I am new to analog setup, my friend Peter has already responded to your inquiry, and has heard my TT directly compared with his SME 10 TT. It was a most informative comparison. In some ways it was unfair, as his cartridge is one of the elite, and his SME table is, by virtue of Peter's diligence and Jim Smith's expertise, very well dialed in.
At present I am searching for another tonearm. I have a couple of options, but the SME V-12 is one I am considering seriously. Albert has had the 312-S for some time and feels it has not been bested. I will let him tell you the details.
I wish I were further on with my selection process so I could further assist you, but Peter's counsel is very good. And he is more concise than I.
In hope that this was of some assistance, I invite you to keep us posted. If you wish to contact me offline, please let me know; I am happy to talk further.
with Very Best Wishes, a la prochaine,