Kubla, by all means, let me add to your confusion. The "old Aires went through, I believe, at least two different platter and bearing changes and the JMW 10, now the 10.5, also went through a few changes as well. So I guess the question should be: "Which Aries are you getting such a good deal on?"
As I said before and as Semi said, the present 9" arm is thought to outperform the 10 and 10.5 arms, at least until the 10.6 is available. I think if I had the choice, I'd take the cheap Aries deal you found and put the JMW 9" arm on it.
Then, down the road, you can always retrofit the new acrylic platter, bearing, and periphery clamp, as can all other Aries owners, (though this will not be inexpensive).
I believe the 10.6 arm will have all the upgrades/refinements of the present 12.6 arm: internal ceramic coating, tungsten-carbide, no-lube bearing, VTA fine adjustment and lockdown, and VTF fine adjustment.
So, as you can see, you are clearly behind the game before you even begin. :)
As I said before and as Semi said, the present 9" arm is thought to outperform the 10 and 10.5 arms, at least until the 10.6 is available. I think if I had the choice, I'd take the cheap Aries deal you found and put the JMW 9" arm on it.
Then, down the road, you can always retrofit the new acrylic platter, bearing, and periphery clamp, as can all other Aries owners, (though this will not be inexpensive).
I believe the 10.6 arm will have all the upgrades/refinements of the present 12.6 arm: internal ceramic coating, tungsten-carbide, no-lube bearing, VTA fine adjustment and lockdown, and VTF fine adjustment.
So, as you can see, you are clearly behind the game before you even begin. :)