hey Tim, congrats on the upgrade. I'm confident you're going to really appreciate the S900's important new & enhanced features.

My favorites being:

1) SA Voices
2) Text Lyric Display
3) Built In Digital Audio Recorder to USB Stick

Above all, is the Yamaha user friendly interface & largest arr community of free software & support, allowing you to create record music on it from the day you receive your keyboard. Happy keyboarding.

Scott