I'm not sure how much I like the CP88. The UI is very cool but the tone generation tech is underwhelming. The action is OK but definitely nothing special.
If I had to buy a stage piano in the next 2 months, I'd probably get either the similarly priced RD2000 (+100) or the MP11SE (+300). Especially If I will use it in the studio for the most part and not have to move it often.
The CP88 is still a very good option for the gigging musician who is always on the move and needs something more portable. Having said, the RD2000 weighs only 6lbs (47lbs vs 41lbs) more than the CP88, but the action and tone generation tech in it is in my mind better than what's in the CP88.