I don't play keys myself, but I do have a Kawai MP 9500 stage piano and it has been very well received by players and listeners alike. The action has received the most praise, but the native Kawai piano sound sits in a mix very nicely. (The Dirty Wurlitzer patch sounds natural too.) As the Sound-on-Sound reviewer noted, the multi-gigabyte samples of Steinway and Bosendorfer would be expected to sound better for a solo, but those can be easily controlled by the Kawai. The Kawai is heavy - over 70 pounds without a case - but still a lot lighter than a spinet, much less a 'high-toned baby grand' (with apologies to Irving Berlin

)