Drminky does bring up a good point that you should consider. That is, what are you likely to do in the future regarding cartridges? And, very important, what table are you using?
If you don't intend in venturing beyond, say a $1K cartridge investment, then I would think that arm based on the Rega design is probably just as good as the JMW-9. At the same time please consider that a cartridge in the range of the Denon 103R will perform extremely well on an arm of a little higher range, and that higher quality arm will open a larger door of opportunity regarding cartridge choice.
Moerch is good choice, but IMO I'd look for a Graham 2.2 to get the more user friendly VTA/VTF adjustments. A used 2.2 can usually be had for not much more than the Moerch. Another option is the Basis Vector. This is an excellant tracking arm and can handle a multitude of cartridges firmly. Not much in the way of easy VTA/VTF but no worse than the OL or JMW-9 you've been considering. You'll have a hard time finding a cartridge that the Vector can't handle, but mounting can be a bit tricky depending on the table you're using.
To sum up, what table are you using, what cartridge might you consider after the 103R, and what is your budget?
If you don't intend in venturing beyond, say a $1K cartridge investment, then I would think that arm based on the Rega design is probably just as good as the JMW-9. At the same time please consider that a cartridge in the range of the Denon 103R will perform extremely well on an arm of a little higher range, and that higher quality arm will open a larger door of opportunity regarding cartridge choice.
Moerch is good choice, but IMO I'd look for a Graham 2.2 to get the more user friendly VTA/VTF adjustments. A used 2.2 can usually be had for not much more than the Moerch. Another option is the Basis Vector. This is an excellant tracking arm and can handle a multitude of cartridges firmly. Not much in the way of easy VTA/VTF but no worse than the OL or JMW-9 you've been considering. You'll have a hard time finding a cartridge that the Vector can't handle, but mounting can be a bit tricky depending on the table you're using.
To sum up, what table are you using, what cartridge might you consider after the 103R, and what is your budget?