The relative silence of Roland and Korg in the arranger area is telling: it probably means they are having to rework their product line to compete with the Tyros. This could be a very good thing in the long run.
Since I work with softsynths and laptops I'm looking forward to getting a MidiMan Ozone USB keyboard, which is like the little Oxygen 8 but it includes the audio interface and direct monitoring capability for no latency. Should make for a nice ultra-small 2-piece studio.
I think that softsynths are the future. There's a lot going on in the softsynth field, which is why so many companies like Midiman, Edirol and Novation are making new MIDI/USB controllers. Creamware's new Noah may be an indication of things to come: softsynths in hard cases. It's still years away but I can see where soon we all might be using softsynth arranger packages in a few years (Tyros-OS softsynth arranger for PC/Mac would be nice, and I'll bet the engineers at Yammy are working on it).
I also think the new little 1/2 rack digital stereo EQ for $199 by Alesis could be a handy thing for keyboards.
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Jim Eshleman