NAMM is right around the corner guys and gals. The Tyros4 seems to be full of bugs and with "4" current bugs (and counting??) it may prove wise to hold off on getting a T4 until Yamaha comes out with an OS update to fix these anomalies. In the meantime, NAMM and/or Musikmesse may turn out to be very productive in the way of top of the line arrangers. Korg is rumored to be releasing a PA2XPRO successor very soon, possibly winter NAMM '11 or perhaps Frankfurt Musikmesse which takes place shortly thereafter.
Roland is up in the air as far as what we can expect from them though. It seems their keyboard production plans are in disarray because of lack of innovation on some of their newest keyboard products such as the GW-8, etc. One glimmer of hope is the fact Roland removed the G70 product info from its website which may portend to a new totl arranger from them soon. Either that or their sales on the G70 have collapsed and further production would not make good business sense so they simply decided to discontinue it. If that's the case Roland may have decided to get out of the arranger market altogether. Time will tell.
If Korg comes through with an amazing technology breakthrough product (and bug free to boot) and doesn't charge an arm and leg (breaking the bank) like the Yamaha Tyros4 and/or the Ketron Audya has succeeded in doing, then Korg should be able to benefit tremendously market share wise from such a product. More power to them. And with Tyros4 and Audya bugs plaguing both boards currently it has opened a window for Korg and/or Roland to capitalize on these turn of events in their favor. We'll find out soon enough I reckon.

All the best,
Mike
[This message has been edited by keybplayer (edited 11-21-2010).]