One point that hasn't been mentioned (or I can't find it) is the sound quality you can expect from the jMW arm. For years i had a JMW 10.5i arm and several extra armtubes and was amazed when an audiobuddy of mine with the same arm claimed that his was roundly beaten, SQ-wise by a Jelco SA-750.
Since the Jelco came in under $500 and i trust my friend's ears, I bought one, and he was absoluely right. No contest at all. I ended up with Jelco 750s on both my tables -- much modified Lenco L75 and Empire 298 (for which the 9" Jelco is a drop-in replacement). I actually cleared over $1K by selling the JMW stuff.
Since the Jelco came in under $500 and i trust my friend's ears, I bought one, and he was absoluely right. No contest at all. I ended up with Jelco 750s on both my tables -- much modified Lenco L75 and Empire 298 (for which the 9" Jelco is a drop-in replacement). I actually cleared over $1K by selling the JMW stuff.