I have both the Tyros and the Motif ES 88.

The voice quality, and especially the acoustic voices, of these machines clearly sets them as leaders in thier respective product lines.

The Tyros voice choices are many, but very manageable. There is a signature voice in most categories, but some categories are stronger than others. The overwhelming theme with the Tyros is compromise. The compromise between cost, voice quality, number of voices, color LCD display, display of music/lyrics on screen, the vocal harmonizer, quality of keys, quantity of keys, weight of the unit, ergonomics, style playback and recording all sum up to provide the user with a good balance of features and cost in a very easy to use package.

The Motif clearly is designed for the professional. The quantity and quality of the voices is almost overwhelming. I personally have discarded many voices in the Motif in order to use the voices that are applicable to the type of music that I play. The quality of the voices are very similar to the Tyros. Some of the Mega voices sound identical. Although the Motif does not have virtual drawbars like the Tyros, you can tweak a voice with unlimited parameters and potential then save those voices to the user area. The keybed and size of the keys in the MO ES 88 are wonderful and a joy to play.

These are only my personal opinions and your mileage may vary, but purchasing either and or both of these boards is a very safe and sound investment that will give you years of joy in your music making.

Al