Solton MS 60. Bought 2 in the late 90's. Played the first one on a patio for 14 years, and used it for all my score roughs until the internal battery died. Using the 2nd one now and will replace the battery in # 1 next week. Also use a Clavinova 65 at home for roughs.

Since I don't use arrangers live anymore, these are my 2 favorites. Have an "in the box" SD-5 if the MS-60's poop out.
And a Midjay. And a Roland 7. and a Casio 88 key thing bought from George Kay...in my office.

Neat old worthless stuff I make a great living with.

Russ