I have had an Aries 1 and JMW 10" (original version) arm for over 10 years. I agree with mant who say that the JMW arm may not be the best arm, but I think that it works well in concert w/ the VPI decks if all is setup properly. Over or under damping is a big issue - it's a PITA to get it just right.
I have tried a variety of cartridges on the JMW arm. The one that stayed the longest was the Grado "The Reference". Not to say that it was the best cartridge for all LPs. But I didn't find anything I liked better of thought was a good value until I tried a Soundsmith "The Voice" cartridge (medium compliance version). I liked it so much that I bought an SMMC1 mono mounted on a seperate JMW arm wand. Works and sounds great, IMHO.
I have tried a variety of cartridges on the JMW arm. The one that stayed the longest was the Grado "The Reference". Not to say that it was the best cartridge for all LPs. But I didn't find anything I liked better of thought was a good value until I tried a Soundsmith "The Voice" cartridge (medium compliance version). I liked it so much that I bought an SMMC1 mono mounted on a seperate JMW arm wand. Works and sounds great, IMHO.