Adimatis, I believe you are referring to the GEM SK88 or SK880 Powerstation.

They are a few years old now and I would guess out of production. I still have one with extra memory and the vocalist installed.

I haven't used it in sometime, but it was a definitely a good board in its day. I should probably put it up for sale, just haven't gotten around to it.

I'm using the Lionstracs Mediastation X88-Pro now. Hammer action, fully weighted 88 keys and a stellar piano sound are a must for me.

Richard