Musikman,
I completely agree with you, that the needs of a person who is composing music in the studio (or even in his bedroom) are quite different than of the one performing live. I think that most often trying to satisfy both ends up satisfying neither.
Out of curiosity, though, why do you want to do it in the keyboard, rather than get a PC? Yesterday we went with my wife computer shopping (she is looking for a light notebook), and we saw the Toshiba 3500 Tablet PC. Not only the thing is cute as a button, but it is light at under 4.5 lbs, and you can navigate your way around the applications with a pen. I don't know if any musical recording programs take advantage of the WinXP Tablet edition, which would allow you to move the notes by dragging them with a pen, but this computer also has a regular keyboard, and a track pad, along with a couple of USB ports. If I was a composer, I'd get this computer with the USB MIDI interface (or just use the USB cable to connect to the USB-equipped keyboard, such as PSR2100, or the new Technics, or Tyros, or whatever). By the specs of it, this is a very capable computer, with a large hard drive, half a gig of memory, and a fairly fast CPU. And it costs less than half of PA1pro MSRP.
If I was a composer and had a keyboard available, I'd buy this thing over another keyboard - this would be the most flexible solution with the fewest compromises.
Then, of course, I don't know what gets your creative juices going. But I am positive that Korg could have done a better job designing this keyboard.
Regards,
Alex
P.S. I am not a computer salesman, nor do I work for Toshiba, but I was very impressed by the functionality of their Tablet PC.
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Regards,
Alex