Technics SP-10 MKIIA tonearms

Downunder, I don't think the mating of a tonearm to a turntable is nearly as critical as mating a tonearm to a cartridge of choice. So, my response to your question would be to choose between the EPA and the Graham based on the cartridge preference. As to a head to head comparison between the EPA 100Mk2 and the Graham Phantom, one's innate bias would lead one to think that the Phantom might be superior in most ways, since it is a modern design beautifully crafted. But at one point in history, the same could be said of the EPA 100Mk2. So you just have to try both and choose, if your cartridge mates equally well with both. One practical point: We know the EPA 100Mk2 will mount on your Technics base; just make sure the Phantom will also fit. There is some space limitation imposed by the square escutcheon that surrounds the platter of the SP10 series. My Triplanar is a poor fit on my SP10 Mk3, for one example, because the Triplanar has the VTA adjust column to the left of its pivot point, and its base conflicts with that escutcheon. I can make it work, but the Triplanar must be mounted far forward on the plinth and at rest it extends over the LP surface. Not good. This is also a problem for the 9-inch Reed and others with similar design.

Unfortunately, electrolytic capacitors will always fail with age, usually anywhere from 10 to 25 years, depending upon use and abuse. It's "the law". But fortunately, modern electrolytics are superior to the ones that were made when the Mk3 was built, and they are very cheap compared to the value of the turntable. In the US, all the capacitors needed can probably be purchased for around $30, from Digikey or Mouser, good quality ones like Panasonic, Nichicon, ELNA Silmic. Removing the old capacitors and replacing them with new is only a matter of soldering skill. No thought is necessary, since you would simply be replacing like with like. I think you can find a service manual on Vinyl Engine. If not, I may have a copy in pdf format. It contains a parts list which can be used as a guide to ordering replacement capacitors.