The JMW-9 "Plus" is the standard 9 arm that is wired with Valhalla wire, it is $300. The JMW-9 "Signature" is the one that Dlwask is talking about, it is $1400 upgrade, or $700 with the trade in of your old JMW-9. Has anyone seen any pics of this arm ? Might be a worthwhile upgrade for $700