I maybe a little bias
but the sound, styles and flexibility of the genesys is superior to the SD1. The genesys is a lot of instrument, and quiet frankly, isn't for everyone. So it depends on what you are going to be doing with the instrument. The ability to load samples, additional styles, or even play with MP3 and wav files makes the instrument pretty versatile. The ability to use hard disk recording and burn CD's right from the instrument is plain ingenious.
------------------
Paul Davis
Generalmusic
Generalmusic.US