The Kurzweil is ill as hell, especially because of all the programming you can do with it. And the sounds are, well, Kurzweil. Nicer than the Korg, but kind of beasts of a different burden.
The Motif over the Triton, unless you get the MOSS xpansion board. If you get a Korg, get the Karma with the MOSS board, you can always disable the KARMA features, and then you've got a damn triton, anyway.