Thank you all for responding to me!

Perhaps we can have a special "s900 user thread"...!

One thing I can say, theres the good part on Yamaha which is ease of use and very good and strong "brass", and clearer speakers.

The overall sound however sounds more "plastic" or whatever its called..

The Korg's overall sound however, sounds much more natural. esp. the sax's.

I still have a lot to learn though on the s900.